I guess I was blessed as I only got to witness a few. Junior guy gonna check high voltage on a small tv display with a multimeter and ordinary probes; fried the meter, blew him across the room and destroyed the display. Workers were cutting a hole in the concrete floor(big walk behind water cooled saw) so we could get at broken sanitary piping. They found a 200 amp 440v main that was not on the building blueprints. no one hurt, blew a 6" hole in the saw blade.
shipmate gonna help the galley crew with broken mixer, opened power panel and somehow had one hand on steel deck and found a power terminal with the other hand, killed instantly. guy working on high powered car stereo, hot and sweaty, touched the wrong spot, found dead later that day.
Electricity is no joke, it is like fire, a force to use that will bite you if you are careless. seen too much, i won't go near 'tricity after half a beer.
scott