We had an electrician at a place I worked at and he was working on a rivet press. He was asked if he'd disconnected the power. He said that he had, and to prove it to the person asking, he placed his thumb under the press. This would have been a splendid idea if he had actually remembered to turn the power off.
The thing that I later regretted saying was when I asked him if he wanted to sell his guitar.
