Disconnect spark plug while working on the mower to prevent accidental engine ignition caused by manually moving the blade. Equipment that is propped up or on jacks also can be a hazard. The time it takes for falling equipment to hit the ground is usually not enough time to react and get out of the way. To avoid these hazards always mechanically lock and block equipment to make repairs. Do not rely on hydraulic systems to suspend equipment for servicing.
Reaction time is important.
When driving a tractor, the operator must respond to situations as they are presented. Operator reaction time is critical in avoiding injury in these situations, but never forget that machines are always faster than humans possibly can react. If your reaction time is very fast, you can avoid being entangled in farm equipment. It takes three-fourths of a second for most people to respond to something. Reacting quickly is the best way to avoid entanglement in farm machinery.