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.
The National Institute of Occupational Safety & Health (NIOSH), studies electrocutions occurring between 1982 and 1994. The NIOSH researchers analyzed 224 electrocutions that resulted in 244 workplace fatalities. The information they learned provides valuable lessons for everyone that works with or around electricity.