I once worked with a guy that kept charged electrolytic capacitors (big ones from datacenter power supplies) sitting loose on his desk. Inevitably someone would pick one up out of curiosity and shock themselves — he'd say something to the effect of "that's why you don't play with other people's stuff."
I'm still surprised he wasn't sued, arrested, or at least chewed out by HR. I once considered turning the tables on him by bribing someone he didn't know to clutch their chest and gasp "pacemaker..." before falling to the ground.
Your short and burn also reminds me of the nichrome-wire fuses we'd make for Estes model rockets when I was a kid. It's amazing I survived to adulthood with all the crazy things we used to do (said rockets, Jacob's ladders made out of furnace transformers, broken thermometers to get at the mercury, hairspray potato canons, ...). That little burn would have been trivial to hide from my parents. (laugh)