Got a new computer and cranked the frame rate to 200, genned a huge map 500 year history in 19 min 38 seconds , had an 8X8 embark everything fine so far, fortress started, first two migrant waves there got a lot of steel made from my starting embark points, so was a happy overseer, dug out a large magma chamber about 20x40 spaces, with some good ores dropped so decided to do d-b-d and band box the area, and set a garbage dump next to the channeled slope into the chamber, and put my attention elsewhere...
Suddenly I have 3 injured dwarves, somebody dropped a rock down the slope. Hmm fluke, went back to my micromanagement, ordering up stuff to build and doing stock piles and so forth...
Now I have dwarves found dead, I look at the slope and there are dead and injured dwarves and the entire dump pile of bolders at the bottom of the slope. The tantrums begin. Time passes so fast I did not realize the Dwarven caravan had been there so long, I order the clothing from the dead to be hauled to the depot, but was unable to get the trade done, and the merchants pack up, I had forgotten to make more booze after the initial 125 that I had made, and I had thirsty dwarves, then winter hit and the ponds froze, no well was built yet, I got 4 or 5 barrells of booze made and the drinking started, but dwarves were dropping dead all over the place, one died while drinking, and his wife, a miner with a steel pick goes berserk, now all my plants , the still and existing booze are all inaccessable due to this berserk dwarfette guarding the body of her beloved husband. The dead are lining the hallways three insane are babbling in corners, one dwarf is still responding to needs, and I build a still and brew a few booze then make some coffins, as the ghosts start rising, and then my last responsive dwarf goes to get the miner's husband for burial, a chase ensues with multiple severings, and now I can just sit and watch, then the screen jumps to a map edge... You have migrants!
Setting my frame rate cap back to 100, and moving any future dump zones at least two steps from a hole I do not want the garbage tossed into.