Whether operating equipment on a manufacturing floor, a jobsite in the construction industry, or in agriculture, machines are common tools. Today’s equipment allows humans to work much faster and with far less physical strain; however they can create enormous hazard if not operated with care. An innocent error – accidentally putting one’s hand where it shouldn’t be, leaving a guard off of equipment or bypassing a safe operating practice – can lead to devastating cuts and disfigurements and lifelong disability.
A common workplace safety question is: “What is the most common injury caused by working with machines unsafely?” Though machine-related accidents could be responsible for injuries of different kinds, it is cuts and lacerations which are the most familiar type, especially because many employees cut or scrape.themselves from sharp edges, cutting components, or any moving parts.
Beyond the basic types of lacerations, and cuts though, in certain lines of work, the most severe types of injuries from machines are those that occur with crushing and amputations and entanglement type accidents and broken bones. Knowing what these type of accidents can occur and how to avoid them is key for anyone employed in industry. Whether you be an employee, student, employer, or supervisor safety with regard to machines and how they should be safely used should always take precedent when at your job.
A Quick Answer
If you just want to know the answer right up front to the most common injury associated with unsafe workplace machinery then it is:
Machine lacerations are among the leading machines to cause injuries at work.
These injuries typically happen when a worker:
- Touches an exposed blade.
- Comes into contact with sharp machine components.
- Reaches into moving equipment.
- Removes machine guards.
- Uses machinery improperly.
- Attempts to clear jams while a machine is still running.
While lacerations are cited in the majority of machine-related workplace accidents, operation of a machine unsafely may result in far more catastrophic injuries such as loss of limb (amputations), crushing injuries, burns, loss of eyes (visual loss) and even death.
Why Machine Safety Matters
Just machines are built to be better, faster and strong than people, the identical power may pose a hazard if safety equipment just isn’t worn.
Industrial machines often contain:
- Rotating shafts
- Cutting blades
- Presses
- Rollers
- Gears
- Belts
- Chains
- Hydraulic systems
- Pneumatic components
Any movement presents a danger for unsuspecting workers stepping into such areas unarmed. Machine incidents occur far more rapidly than most hazards at the workplace. Machine accidents are often measured in mere seconds because machine clothing or extremities or hands can all quickly become trapped and are difficult to extract before extensive injury.
Understanding Machine-Related Injuries
Machine injuries occur whenever part of a person’s body comes into contact with dangerous moving equipment or when machinery unexpectedly releases stored energy.
These injuries may happen during:
- Operating machinery
- Cleaning equipment
- Maintenance work
- Repair tasks
- Setting up machines
- Removing jams
- Loading materials
- Unloading finished products
Most accidents tend to happen when machines aren’t operating and where people assume machines are off or no danger exists of them moving.
Why Cuts and Lacerations Are the Most Common Injury
The answer to what the single most frequent type of injury is when using machinery, often comes down to the typical nature of how such machinery works. Many types of machines used in industry utilise blades, cutters or simply the rapidly rotating mechanisms to do work, whereas less visually aggressive machines such as automated manufacturing machinery will invariably have exposed sharp edges, blades or other elements that can be extremely painful and capable of producing deep cuts.
Common sources of cuts include:
- Table saw blades
- Band saws
- Circular saws
- Metal cutting machines
- Sheet metal edges
- Milling equipment
- Food-processing slicers
- Packaging machinery
- Paper-cutting machines
These will in cases may only need simple first aid to begin with and others may result in severing any or all of the following; nerves, muscles,blood vessels and/or tendons, in which case may require emergency surgical treatment .
Common Types of Machine Injuries
While there’s an abundance of unsafe machine accidents that take place in workplaces, injuries from cuts and lacerations are more than the average mostcommonly reported injuries.
Lacerations
Deep or superficial scratches or tears to the skin from a sharp machine. Injuries range from shallow skin lesions to serious trauma affecting tissues, nerves, tendons and even muscle.
Typical causes include:
- Contact with exposed blades
- Broken cutting tools
- Sharp metal edges
- Improper machine maintenance
Crush Injuries
Machines capable of applying tremendous force can trap body parts between moving components.
Examples include:
- Hydraulic presses
- Industrial rollers
- Stamping machines
- Conveyor systems
Crush injuries often damage bones, muscles, nerves, and blood vessels simultaneously.
Amputations
Machine Amputations Perhaps the most horrendous accident in the list of machine based trauma, an amputation can mean serious loss and can occur when an individual’s extremities such as fingers, hands, arms, toes or feet get snagged by moving equipment and the member has to be surgically amputated from the body completely or partially.
Amputations most commonly occur when workers:
- Remove safety guards
- Reach into operating machines
- Attempt repairs without shutting equipment down
- Wear loose clothing around rotating machinery
These injuries often have lifelong physical and emotional consequences.
Fractures
Fractures often the result of machine-related injuries For those that are unable to return to work or perform some other types of job after a disabling event, having lost ability. A construction workers’ accident injury on the job might entail a number of possible things to consider on this matter such as. The weight and size involved in operations, this sometimes makes it possible for equipment to strike and crash onto workers or cause injuries involving limbs being pinned somewhere by some component of the operation. Accidents wherein a person loses balance as they work within equipment are capable of giving rise to fractured limbs and bones.
Eye Injuries
Flying debris represents another major workplace hazard.
Grinding, cutting, drilling, and machining operations may produce:
- Metal fragments
- Wood chips
- Dust
- Sparks
- Plastic particles
Without safety glasses or face shields, these materials can damage the eyes within seconds.
Burns
Certain machines generate intense heat or involve electricity.
Workers may suffer burns from:
- Hot machine surfaces
- Steam
- Molten materials
- Electrical faults
- Friction
Proper insulation and protective equipment help reduce these risks.
Entanglement Injuries
Serious entanglement hazard caused by rotating machinery Hair, jewelry, loose sleeves, clothing and even gloves could get wrapped around moving shaft or spindles by great pulling forces. Many injuries could take place during a single entrapment event.
Which Machines Cause the Most Injuries?
Whether you will be injured and how severely will rely on how the equipment is manufactured and operated and whether safety measures are put in place, of course. There are certain machines that we see popping up in workplace injury reports time and time again – they usually have potentially dangerous moving parts and people interacting with them all day long.
Examples include:
| Machine Type | Common Injury Risks |
| Table saws | Deep cuts, amputations |
| Band saws | Lacerations, finger injuries |
| Drill presses | Entanglement, puncture injuries |
| Milling machines | Crush injuries, cuts |
| Conveyor belts | Pinching, entanglement |
| Power presses | Crushing, amputations |
| Meat slicers | Severe lacerations |
| Agricultural machinery | Entanglement, crushing |
| Industrial rollers | Crush injuries |
| Woodworking equipment | Cuts, kickback injuries |
Each machine presents different hazards, which is why proper training should always be specific to the equipment being used rather than relying on general safety knowledge.
How Unsafe Machine Practices Lead to Injuries
The majority of accidents involving machines never result in equipment spontaneously failure. Machine accidents are primarily due to a confluence ofunsafe practices, insufficient training, and lacking safety safeguards. Among the most commonly engaged in unsafe practices are the following:
Removing Machine Guards
Machine guards stop workers from coming into contact with hazardous moving machine parts. When guards are removed or by-passed it considerably increases the risk of injury or serious accident.
Reaching Into Moving Equipment
Workers sometimes attempt to clear jams or adjust materials while a machine is still operating. Even a brief moment of contact with moving components can result in severe cuts or crushing injuries.
Ignoring Lockout/Tagout Procedures
Ignoring OSHA lockout/tagout (LOTO) safety procedures. Never perform maintenance on live equipment If the machinery cannot be switched off before work, there is a risk of the mechanism kicking back on with anyone standing in the way.
Wearing Loose Clothing or Jewelry
When your sleeve, necklace, ring, or even long hair get caught, it will almost immediately entangle itself in the machine.
Operating Machinery Without Proper Training
If machine operators don’t understand a machine fully — or it’s operating hazards and emergency shut-offs — they are far more likely to operate machines incorrectly and experience a mishap.
Industries Where Machine Injuries Are Most Common
Working with machinery carelessly can really happen in just about any setting, as some workplaces expose people to the danger on account of workers using powered machinery routinely. Machine hazards in jobs are higher in these specific ones:
- Manufacturing
- Construction
- Agriculture
- Food processing
- Warehousing
- Metal fabrication
- Woodworking
- Printing
- Automotive repair
- Recycling facilities
Each industry uses different equipment, yet the same safety principles apply: proper guarding, training, maintenance, and safe operating procedures are essential to reducing injury risks.
Why Prevention Is More Effective Than Treatment
Even so called small injuries can lead to long term or chronic problems. A severe gash can Sever a tendon or nick a nerve; a crunch wound can mean several months of rehabilitation; severe damage can take away limbs or require worker adjustments for the rest of their careers. Since machine injuries can happen with sudden, unexpected force to an employee who has no opportunity to react, prevention by the employer and worker-that is through hazard assessment and management-is a major key to machine safety and the prevention of these accidents altogether.
Why Machine Injuries Happen
Even knowing that moving blades are common unsafe injuries doesn’t reveal anything more about machine injuries – Why it’s happening, for example. A look at most accident investigation reports suggests they resulted from exposure to dangerous parts of machinery like rotating bits or moving blades. But even as they may highlight the most direct “agent of injury”, further investigation usually reveals poor workplace training, lax equipment maintenance, removal of machine guards or generally risky methods employed by staff. Working SAFELY with machinery – is a matter of not allowing such things to happen and being aware of hazards and controlling for them -Machine injuries, for the most part, do not.
Common Causes of Machine-Related Injuries
Machine injuries rarely result from a single mistake. Instead, they usually involve several contributing factors.
Lack of Proper Training
Operating industrial machinery requires more than knowing which buttons to press. Workers should understand:
- How the machine operates
- Its specific hazards
- Emergency stop procedures
- Safe operating limits
- Maintenance requirements
- Lockout/tagout procedures
Employees who receive incomplete training may unknowingly expose themselves and others to serious risks.
Removing or Bypassing Machine Guards
Machine guards are among the most important engineering controls in workplace safety, helping prevent injuries caused by hazardous machine guarding risks.
They create a physical barrier between workers and hazardous machine parts, including:
- Rotating shafts
- Belts
- Chains
- Gears
- Cutting blades
- Pinch points
Some workers remove guards because they believe doing so speeds up production or makes maintenance easier. In reality, removing a guard significantly increases the risk of severe injury.
Poor Equipment Maintenance
Machines that are not inspected or maintained regularly can become unsafe.
Potential problems include:
- Loose components
- Dull cutting tools
- Faulty emergency stops
- Hydraulic leaks
- Damaged electrical wiring
- Malfunctioning sensors
Routine maintenance helps identify these issues before they contribute to an accident.
Fatigue and Distraction
Machine operation is an activity requiring vigilance We recognize that if workers feel tired, stressed, rushed, or are not focused at work-they might forget critical safety precautions like, checking machine guards, ensuring the area around equipment is clean and clutter-free before powering equipment up. The slightest mental slip-up might cause a serious injury.
Unsafe Work Practices
Examples include:
- Reaching across moving machinery
- Wearing loose clothing
- Ignoring warning labels
- Using damaged tools
- Operating equipment beyond its intended purpose
- Bypassing safety devices
Unsafe habits often develop gradually and may seem harmless until an accident occurs.
High-Risk Machine Hazards
Different machines present different risks, but several hazards appear repeatedly across industries.
Rotating Parts
Rotating shafts, spindles, and rollers can catch:
- Gloves
- Sleeves
- Jewelry
- Hair
- Cleaning cloths
Once entanglement begins, the machine can pull a worker toward the hazard in a fraction of a second.
Pinch Points
A pinch point exists wherever two objects move toward each other or where one moving object approaches a stationary surface.
Common examples include:
- Conveyor rollers
- Presses
- Hinges
- Gear systems
Hands and fingers are especially vulnerable.
Cutting Hazards
Many industrial machines use sharp blades or cutting tools.
These include:
- Circular saws
- Band saws
- Guillotine cutters
- Food slicers
- CNC cutting equipment
Failure to use proper guarding dramatically increases the risk of lacerations and amputations.
Flying Objects
Machining operations often produce:
- Metal chips
- Wood splinters
- Plastic fragments
- Broken cutting tools
Without eye and face protection, these materials can cause serious injuries.
Unexpected Machine Start-Up
One of the most dangerous situations occurs when machinery starts unexpectedly during maintenance or cleaning.
Unexpected startup may result from:
- Electrical energy
- Hydraulic pressure
- Pneumatic pressure
- Gravity
- Stored mechanical energy
This is why lockout/tagout procedures are critical.
Lockout/Tagout: A Critical Safety Practice
Lockout/tagout (often abbreviated as LOTO) is a safety procedure used to ensure that machinery remains completely de-energized before maintenance, cleaning, or repair begins.
A typical lockout/tagout process includes:
- Shut down the machine.
- Isolate all energy sources.
- Apply lockout devices.
- Attach warning tags.
- Release stored energy.
- Verify that the machine cannot start.
Following these steps helps protect workers from unexpected machine movement.
The Importance of Machine Guards
Machine guards are designed to reduce exposure to hazardous moving parts.
Common types include:
Fixed Guards
Permanently attached barriers that cannot easily be removed during operation.
Adjustable Guards
Can be repositioned for different workpieces while still protecting workers.
Interlocked Guards
Automatically stop machine operation when opened or removed.
Self-Adjusting Guards
Move automatically as material passes through the machine while maintaining protection.
Personal Protective Equipment (PPE)
Personal protective equipment cannot eliminate machine hazards, but it provides an additional layer of protection when engineering and administrative controls are already in place.
Depending on the work environment, PPE may include:
| PPE | Purpose |
| Safety glasses | Protect against flying debris |
| Face shields | Shield the face during grinding or cutting |
| Hearing protection | Reduce exposure to loud machinery |
| Steel-toe boots | Protect feet from heavy objects |
| Hard hats | Reduce head injury risk |
| Protective clothing | Minimize certain workplace hazards |
Workers should remember that PPE is most effective when used alongside safe machine operation—not as a substitute for machine guards or proper procedures.
Safe Machine Operating Practices
Employers and workers share responsibility for maintaining a safe workplace.
Good operating practices include:
- Inspect machinery before use.
- Follow manufacturer instructions.
- Never remove guards.
- Keep work areas clean.
- Report damaged equipment immediately.
- Stop work if unsafe conditions exist.
- Use the correct tool for the job.
- Stay focused while operating machinery.
These practices reduce both the frequency and severity of workplace accidents.
Employer Responsibilities
Employers play a central role in preventing machine-related injuries.
Their responsibilities generally include:
- Providing appropriate training.
- Maintaining machinery.
- Installing proper guards.
- Conducting hazard assessments.
- Developing emergency procedures.
- Providing suitable PPE.
- Encouraging hazard reporting.
- Investigating incidents to prevent recurrence.
A strong safety culture begins with management and is reinforced through regular communication and supervision.
Employee Responsibilities
Workers also contribute to a safer workplace by:
- Following established safety procedures.
- Using equipment only after proper training.
- Wearing required PPE.
- Reporting hazards promptly.
- Avoiding shortcuts.
- Participating in safety training.
- Asking questions when uncertain.
Safety is most effective when everyone understands and fulfills their responsibilities.
Real-World Workplace Scenarios
Examining realistic situations helps illustrate how machine injuries occur and how they can be prevented.
Scenario 1: Clearing a Jam
Work goes in Packaging Machine jams A worker see the product stuck in a packaging machine. The worker doesn’t stop the machine instead of that stick his hand into the machine while operating and got trapped with a serious hand injury due to rapid cycling of machine. Better option : Always stop the machine down, Lockout / Tag Out should also apply if need be before you clear. Make absolutely sure no movement is there in machine.
Scenario 2: Missing Machine Guard
The guard is removed from the saw because it obstructs visibility. During a normal cutting operation, the operator’s hands are thrown off course, and into the exposed blade, causing deep wounds. Safer method: Keep all machine guarding in place and properly adjusted. If machine guard obstructs vision: Work with manufacturer or your safety manager for options to improve view while retaining guard.
Scenario 3: Loose Clothing
A worker in a baggy hood, checking machinery with rotating parts… gets pulled into the machinery by her sleeve. Safer choice: wear well fitted work clothes, secure loose hair and remove jewellery when working near rotating equipment.
Scenario 4: Inadequate Training
An employee only a week into the job is told to work with equipment they’ve never seen before, with no guidance. Trying to operate the machine, they touch the wrong control, resulting in a hand injury. The safer way: Guarantee employees are trained to use their equipment specifically, proving to be competent in its operation before working with it unsupervised.
Building a Strong Safety Culture
Written safety policies are a foundation for the safe use of machinery; more importantly is a company culture that values safety above productivity. That means workers at all levels feel empowered to report hazards, pose questions, and to pull the plug when machinery is not safe. By implementing regular safety meetings, conducting regular inspections and retraining and by promoting constant two-way communication, organizations can reduce workplace accident rates.
Never consider workplace safety as a brake on the productive functioning of the plant floor.
Safe machine usage may actually lower injuries, damaged equipment and downtime and consequently, decrease production costs. Be watching for Part 4 which includes such sections as emergency response post-injury, long-term health consequences of machine injuries, common mythologies, top advice, conclusion and FAQ and recommended readings and additional resources to keep this information as fresh as possible for workers.
Emergency Response After a Machine Injury
In fact, in even the safest companies, accidents are an every-day risk and when they do occur, getting off to a swift, orderly and correct start could minimize the injury incurred by the one worker and save another worker from getting injured during that mishap.
But no other action comes into play before the area can be made safe. If there’s a machine that remains operational or remains the hazard creating activity, that piece of equipment has to be disengaged through emergency controls, as long as no one’s safety is going to be increased by doing so.
After the immediate hazard has been controlled:
- Call emergency medical services if the injury is serious.
- Notify the appropriate supervisor according to workplace procedures.
- Provide first aid only if you are trained and it is safe to do so.
- Keep unnecessary personnel away from the area.
- Preserve the scene if an investigation is required, unless doing so would endanger others.
Severe injuries such as amputations, crushing incidents, or heavy bleeding require immediate professional medical care.
First Aid for Common Machine Injuries
What to do when an injury occurs Depending on the severity and the source of your workplace injury will change how it’s handled. Some Workplace first-aid kits will provide you with the means to take care of minor wounds, but anything with a high degree of trauma needs to be checked out by medical experts.
| Injury | Initial Response |
| Minor cuts | Clean the wound, apply pressure if needed, and cover with a sterile dressing. |
| Deep lacerations | Apply firm pressure to control bleeding and seek emergency medical care. |
| Eye injuries | Avoid rubbing the eye. Follow workplace emergency procedures and obtain immediate medical evaluation. |
| Crush injuries | Call emergency services and avoid moving the injured person unless necessary for safety. |
| Burns | Cool the affected area with cool (not ice-cold) running water for minor burns and seek medical attention for serious burns. |
| Suspected fractures | Keep the injured area still and obtain medical assistance. |
These are general first-aid principles and should not replace workplace emergency procedures or professional medical advice.
Long-Term Effects of Machine Injuries
Everyone may be focused on the initial physical injury, machine related accidents, however can result in long term effects of a traumatic experience long after you have recovered.
Depending on the severity of the injury, long-term effects may include:
- Reduced strength or mobility
- Permanent nerve damage
- Chronic pain
- Limited range of motion
- Loss of fingers, hands, or limbs
- Emotional stress following a traumatic incident
- Extended rehabilitation
- Time away from work
Recovery often involves collaboration between healthcare providers, rehabilitation specialists, employers, and employees to support a safe return to work whenever possible.
Common Misconceptions About Machine Safety
Improper views or opinions on machines can lead to taking unnecessary hazards. Altering these misconceptions allows the worker to act with proper caution.
Myth: Experienced workers don’t get injured.
Reality: Experience is valuable, but it does not eliminate risk. Complacency, routine tasks, and overconfidence can contribute to accidents, even among highly skilled operators.
Myth: Machine guards slow down production.
Reality: Machine guards are designed to reduce exposure to hazardous moving parts. Removing them may appear to save time, but it significantly increases the risk of serious injury and unplanned downtime.
Myth: Personal protective equipment alone is enough.
Reality: PPE provides an additional layer of protection, but it cannot replace proper machine guarding, safe operating procedures, and effective training.
Myth: Small machines are harmless.
Reality: Compact tools and smaller machines can still cause severe cuts, amputations, eye injuries, or entanglement if used improperly.
Myth: A machine is safe as soon as it’s switched off.
Reality: Some equipment contains stored electrical, hydraulic, pneumatic, or mechanical energy. This is why lockout/tagout procedures are essential during maintenance and repair.
Expert Recommendations for Safer Machine Operation
What Machine Injury prevention is and should be doing Security professionals will argue that a strong approach to Machine Injury prevention necessitates many layers of protection – not one solution.
Some widely accepted best practices include:
- Provide machine-specific training before allowing independent operation.
- Perform routine inspections and preventive maintenance.
- Never bypass or remove machine guards.
- Follow lockout/tagout procedures during maintenance.
- Encourage workers to report hazards without fear of retaliation.
- Keep your workspace tidy by removing unnecessary clutter.
- Replace damaged equipment promptly.
- Conduct regular safety reviews and refresher training.
A proactive approach helps identify hazards before they result in injuries.
How Technology Is Improving Machine Safety
Companies often incorporate technology into today’s factories that decreases the chance of injuries from machines and increases production.
Examples include:
Smart Machine Sensors
Sensors can detect abnormal operating conditions and automatically stop equipment before a dangerous situation develops.
Light Curtains
These optical safety devices create an invisible protective barrier. If someone reaches into the hazardous area while the machine is operating, the system automatically stops the machine.
Presence-Sensing Devices
Some equipment monitors whether a worker has entered a restricted area and prevents machine operation until the area is clear.
Automated Emergency Stops
Emergency stops Modern machinery now uses a number of emergency stop systems, making it easy to abort quickly when required. These devices make it safer to work in some environments when implemented correctly alongside appropriate safe working procedures and training practices.
Building a Long-Term Safety Mindset
Safety in the workplace isn’t a single project but an ongoing process. Explore more workplace safety and legal guides on the LawHeavy . Well-rounded safety programs foster a culture of learning, constant inspections, open dialogue and operational procedures which are consistently evaluated.
Employees should:
Feel able to report hazardous conditions
Be able to ask questions
Not be afraid to halt operations if they are concerned that any aspect can’t be handled safely. Employers must take responsibility:
Train employees on equipment as well as workplace functions and processes as technology changes. A positive safety culture benefits both everyone and the company – minimizing accidents, maximizing productivity, employee comfort, and overall efficiency and reliability.
Conclusion
Are you wondering, what is the most common injury from working with machines unsafe to workers? Safety injuries can take many forms. Unsafe machine work most commonly causes cuts and lacerations; this often occurs when employees touch exposed blades, sharp surfaces or moving machinery parts. Yet other unsafe machinations can include bone breaks, blindness or another eye injury, burning, dismemberment or crush injury, and other terrible instances too.
The benefit to this alarming information is most machine injuries are to a large extent preventable. When employers use equipment guarding, machine operations trainings, lockout tags, routine upkeep and upkeep, suitable safety apparatus, plus safety-positive workplace.
Regardless if one works machine equipment as your full career or even trying out machine safety learning to some level you can shield colleagues and you at work with caution.
Frequently Asked Questions
1. What is the most common injury caused by working with machines unsafely?
A good bet on the most likely type of injury from unsafe machine usage-the best bet really-is being cut and/or lacerated. Usually, cuts and lacerations are the direct result of the workers getting “too close” to the rotating knives of a cutting mechanism, etc.
2. Which machines are most likely to cause serious injuries?
Table saws, power presses, conveyor systems, band saws, drill presses, agricultural equipment, industrial rollers, and food-processing machinery are among the machines that can cause serious injuries if used improperly or without adequate safeguards.
3. How can machine-related injuries be prevented?
Effective prevention includes proper training, machine guarding, lockout/tagout procedures, routine maintenance, hazard assessments, safe work practices, and appropriate personal protective equipment.
4. Why is lockout/tagout important?
Lockout/tagout helps ensure that machinery remains completely de-energized during maintenance or repair, reducing the risk of unexpected startup and serious injury.
5. Is wearing PPE enough to stay safe around machines?
Is a barrier that is used in conjunction with, or is in addition to engineering controls. (PPE does not stand for \”personal responsibility enforcement.\”) OSHA suggests using several levels of protection when designing safety measures for a program.
6. What should I do if a machine injury occurs?
Render the scene safe, if that is possible; Inform others of any dangers and call for emergency services if necessary; Adhere to your workplace’s emergency procedures. Apply or obtain professional medical care if you or anyone involved suffers a serious injury.
7. Can experienced workers still suffer machine injuries?
Certainly. As we become more skilled through experience certain risks may lessen over time, but not entirely mitigate, and things can still go wrong due to overconfidence, distraction, exhaustion, equipment malfunction or shortcuts.
