Well, my grandfather once blew up a car battery by disconnecting the charger before all the gas from the battery had dispersed. Blew battery acid all over his front, and trashed the overalls he was wearing as well as the clothes under them.

His son (my uncle) had to have a bunch of metal wires in his right thumb after he smashed it with a sledgehammer trying to break some rusted part or other loose on a car.

This kind of thing clearly runs in the family. I can definitely see something spectacularly "shade-tree" happening to me. So far all I've managed to do is shoot the sprocket circlip on a Sturmey-Archer hub at my face while prying it off and deliver a deep cut to the palm of my hand with a pair of cable cutters.