Well, horseplay on the job is just as dangerous, and like the cases of the airplane and automobile, the person endangered isn't just the one that's horsing around. Other people are involved.
Typically, electricity is provided to your building or facility by way of underground or overhead power lines originating from a nearby electrical power plant. The power lines feed into your electrical breaker panel(s). Each breaker in a panel represents a circuit supplying electricity to a designated area of your building.