It is good to maintain a safe work environment
Jim is a roofer putting new shingles on a two-story house.
Jim wants to climb a ladder.
Jim puts the ladder up and makes sure it is secure before climbing it.
Jim leans the ladder against the wall without securing it and begins to climb it.
Jim safely makes it to the roof and completes the job.
The ladder falls over, and Jim hurts his arm in the fall.