ha, some funny stories in this thread. I once dropped a long handled screwdriver while I was working in the back box. It fell down the hole in the head and right onto the transformer below. (the pin was on) I grabbed it without thinking and got a hell of a shock. Thought I was having a heart attack as my chest hurt like hell. After sitting down for a while I had to stop fixing pins that day and go home to bed.
Another time I stripped a wire with my teeth from a flipper coil while the machine was on. I thought my tongue had been cut off! Damn that hurt. Never did that again...