A very well timed goblin ambush managed to take my population from 120 to 39 (I hadn't gotten my military going properly because of a complete lack of ore) and everyone started throwing tantrums and murdering each other and generally hastening the end of the fortress.
I locked 4 dwarves in a room deep underground with a buttload of food and drink with the intention of repopulating the fortress once everyone else had died. I set them to smooth and engrave the walls to keep their minds off what was going on above. There was a child, a crafter, a miner and a farmer. The crafter quickly went berserk and punched the farmer in the head so hard he died immediately. He then picked up a barrel of wine and started bludgeoning the child over the head with it. It went on for like a month, it was hilarious. All this time, the miner was running in tight circles near the door (which was locked). Once the crafter finally killed the child, he went straight for the miner. He stood in the miners path, this was his mistake. Without skipping a beat, the miner swiftly wrecked his shit with a pick to the skull, and just continued running in his circles. He then went insane and died of starvation.
While all this was happening, there was a dwarf upstairs in the main hall who, according to Dwarf Therapist, was ecstatic. I checked her thoughts in DF and she was indeed ridiculously happy. Nevermind the fact that everyone she knew and loved was either dead or about to be, or that there was a tribe of angry goblins raping and pillaging their way through the fortress! This dining hall is LEGENDARY.