Yep, we had a joker like that that used to work at the company I do... Thought he was going to " show off" by working inside a 400A 600V splitter live, even though the boss had made arrangements to shut it all down..
To make a long story short ( no pun or anything intended) He DID short out one phase to ground, welded his ratchet to the splitter itself and then tried to disguise the big flare mark... The bugger is lucky the fuses opened quick and the arc didn't burn him... Needless to say he isn't an employee where I work anymore!