[JJMcJ]

TV repair shops use a special tool to discharge those caps, basically a high voltage rated resistor pack.

Largely a disappeared skill.

I believe if you are really lucky if you discharge with a screwdriver, the cap can explode, not just melt the screwdriver. Same with batteries, like auto batteries, extra points there with boiling acid and hunks of thick plastic flying around.

[bigiain]

Pretty sure a car battery (at least the old school 12V lead acid type) wont explode from a short. I welded a spanner onto the terminals of one once by clumsily dropping it and having it land across the terminals.

Now I have to go look on youtube, to see if anyone's filmed themselves dropping a spanner across a Tesla's battery...

[pnutjam]

Growing up, my dad had a shirt with acid holes. My mother said he blew up a battery while working on it. My dad was a DYI guy, but didn't regularly work around anything caustic. This would have been early 1980's.

[bigiain]

I have seen car batteries explode, always due to bad charging rather than shorting though. (Over charging generates hydrogen and oxygen inside the battery in precisely the correct stoichiometric ratio to go "BOOM!")

(I also had a friend wake up to about $500 worth of dead tropical fish, the morning after plugging a charger and car battery in on the shelf under his tank. Not entirely sure what the mechanism was, but the pH in the tank dropped enough to kill all the fish. )