Back in my kollege daze, there was a elevator in one building. Some geniuses decided it was a good idea to fill the elevator, then start jumping in unison.
Nothing happened, but a few weeks later, the elevator was condemned for having bad cables.
Perhaps a bunch of physics majors? Were they playing the "Infinity Bottles of Beer" game?
I know someone who thought it would be a good idea to drop a pane of glass down an elevator shaft in the gap between the elevator car and the floor.
Back when a local power plant was being built, the construction workers thought it was great fun to fill the elevator, then in route up, jump and cause the breaker to trip.
Then we would have to send someone to reset the breaker.
We broke them of that on a hot day when we waited about an hour to reset the breaker.