Kind of related to wiring work safety, but once when young I was working under dash and my big class ring shorted to a hot wire. Got a arc burn on my finger, nothing serious but now don't wear ring working on car.
When I arrived at Navy ET-A school at Treasure Island in the fall of '68, the school wasted NO time in starting to indoctrinate us in electrical safety, remove watches, rings, "work with one hand behind you," etc
I "car guy" from Mich. showed me a huge scar on his left wrist. He was working on a buddy's car with an alternator (GM) and got his Spidel "twist - o -flex" watch band WELDED TO HIS WRIST as it shorted from the alternator output to ground.
It had to be surgically removed. I'd bet money that was no fun