It's also amazing how dwarves have absolutely no sense of urgency and have no idea how to prioritize. I recently played one of the most catastrophic forts I've ever played; my entire military died during a goblin siege, and I was forced to shut the gates (a neat row of floodgates that are lifted up so that caravans can come in), leaving about 15 drwarves, including the mayor, outside of the gates with no way back into the fort. As they were getting slaughtered out there, I checked the forts rations to discover that I had virtually no food and the booze was running out. The food was no problem, as I had about 30 muskoxen, but all the water sources were outside so my dwarves were destined to suffer death by dehydration.
So I began building a channel from an underground lake to the main hall of my fort, away from all the nasty shit like giant toads and lizardmen. The channel was near completion, I had installed a floodgate and ordered it to be rigged to a lever. I had only one mechanic left, who started to work on the gate. He worked for a while, until he suddently decided to leave the job and go on a break.
Now, as he mechanic was lounging in the refuse, vomit, blood and corpse-littered main hall of the fort, eight dwarves died of thirst. He eventually finished linking the floodgate and there was water, but apparently the eight deaths were too much for the dwarves who already had their friends die outside, which sparked a massive tantrum spiral. More and more dwarves began going berserk and started killing all the damn muskoxen queued for slaughtering, effectively destroying the fort's only food supply.
I'm not sure, but I sincerely hope that the mechanic was among the last dwarves who died of starvation. That way he would have been there to see the apocalyptic results, the otherworldly madness caused by his righteously-placed break.