I was working under the dash on my BX2230 installing a TinyTach, hooking up hot and ground wires. Somehow I got my watch band touching the positive battery post and a metal bracket at the same time. The band got really hot really fast, and it took a second to figure out what was going on. It's a Seiko titanium watch and band, and apparently titanium is a very good electrical conductor. So by the time I got it off, my wrist was burned almost completely around, except where the watch case was. It did burn through a couple of the pins in the band, but other than that it was undamaged. I fixed those and I had to wear it on my right wrist for a month or so until the burns healed.
The other wrist has a big burn scar where a 3/4", nearly red hot lock washer fell into the cuff on my work glove. That one stung a little bit.