Not quite in your league, but i'll tell n e way LOL

I was changing the battery on my bro's 306 last night (on a badly lit driveway ), put the new battery in, started the car up to check it was working (which it was now ) , then thought o yeah best do the clamp back up, had a extension bar to reach down to the clamp on the left, and the ratchet in my had doing it up

Somehow i ended up with the ratchet in my hand, and shorting across the 2 battery terminals, with the engine running , few sparks later and a new pair of pants all is fine