Stone Wera has been happy lately. He has had FUN recently.
Because I'm an idiot I decided to make stonefall traps at the entrance to my fort (basically a hollowed out moutain). A baby raccoon waltzes in and triggers the trap. I had neglected in placing supports below them, as a retractable drawbridge, guards, and a ballista lay before it. So, of course, it causes a cave-in (yes, another cave-in) and into the dining room. A few deaths, mostly from the new migrant wave. They had next to no friends, so it wasn't cause for much panic. But an artifact chair was destoyed in the collapse, and the creator threw a hissy fit (it wasn't even valuable, less than 10,000 dorfbucks, there must be cotton candy trousers worth much more than that). He calmed down after a while, but killed a single kitten which belonged to the widow of one of the victims of the cave-in (an older member, legendary brewer). She went melonchy after that, threw herself off of the mountain. Her children went berserk (except for one who went stark raving), beating up old ladies and pulling levers at random. Now you see, my fort is perfectly prepared for an attack from the outside, but when I opened the Circus I was all but helpless. Fortunately I had built a retracting bridge from the cotton candy mines to my fort, and raised it when I finally did pierce the Circus. So the trio of enraged minors made their way deeper and deeper into my fort until they had come to the lever, the only thing preventing the demons from destoying my base, and possibly the world. You can guess what happened next. It took less than two minutes for my base to be engulfed by the teeming hordes of hideous beasts. A sixteen year old fort destoyed because the guard let a damn raccoon in. I plan to visit it in adventure mode.
EDIT: As it turns out, it was not the maker of the artifact chair who tantrumed, but a legendary engraver. His master piece engraving was destroyed on the floor above, and the chair was destroyed later due to a demon's fire.