Ok, this was kind of horrifying, and also vaguely amusing, as is everything weird that dwarves do.
A ways back, I built a large jail. I tend to build all of my rooms large, just because I never know when I might need some extra space for something. I put in 3 chains and a pair of cages, and added in a square of food and a square of drink stockpiles within reach of each one, because I'd heard that you needed to do that sometimes. I've never actually built a jail before, so made both one of the cages and one of the chains a room. Apparently I missed flagging the chain as 'used for justice' - which resulted in this event.
So I went about my business as usual. My countess (curse her lazy hide) demanded the construction of a steel throne. Not having access to flux, I let it pass. So of course when the time came, she imprisoned one of the metalcrafters. After a fair bit of time had passed, just about the time I was thinking of checking on him, I got a message:
"Doc Whiskey has thrown a party at Chain" (Doc Whiskey being the combination High Master Diagnoser and High Master Brewer who showed up one day at my fort).
Fascinated, I watched as half my fort came piling into the jail to party in the dungeon. Then I noticed something else - the guy who had been jailed was Thirsty AND Hungry! The partying dwarves were eating his food! Not only that, but nobody cared to come bring him food or drink either, and he actually DIED of thirst with all these dwarves partying around him! And, to make it even more amusing, immediately after the party ended.
The logical conclusion to this of course is that everyone hated that Metalcrafter, and came to torture him by stealing his food and laughing at him as he slowly wasted away.