Success! Kinda. I managed to cave in the bottom couple floors, but not the rest of it. Still, it was pretty damn impressive. You all shoulda seen it. It reduced my FPS to 1, and then to 0, but it was still really really cool.
*some 15 minutes later*
By god I did it. Holy cow. It caused so much lag that I thought I'd crashed it instead. The messages are hilarious. I'll start at the moment the cavein occurred and quote every message. Okay...
Ablel Oshoshurva, Cat (tame) has been crushed under the collapsing ceiling.
You have struck wax opal!
You have struck gypsum!
Tholtig Osodment, miner has been crushed under the collapsing ceiling.
You have struck gypsum!
You have struck jet!
You have struck cherry opal!
Aban Mistemzaneg, miner has been crushed under the collapsing ceiling.
Cog Medtoborstist, miner has been crushed under the collapsing ceiling.
Urist Nilasol, miner has been crushed under the collapsing ceiling.
Goden Rulfikod, cook has been crushed under the collapsing ceiling.
You have struck gypsum!
You have struck jet!
You have struck hematite!
You have struck aventurine!
You have struck saltpeter!
You have struck kaolinite!
You have struck jet!
You have struck hematite!
You have struck kaolinite!
You have struck lignite!
You have struck anhydrite!
A section of the cavern has collapsed!
Man it's funny. FPS reduced to absolute zero for three minutes while it calculates one frame, five dwarves and a cat were killed "under the collapsing ceiling", we suddenly managed to strike every ore we haven't found yet all at the same time without using a third party hacking tool, and by the way a section of the cavern collapsed. NO SHIT SHERLOCK.
I think that making a movie of this would be kinda... weird... people wouldn't quite get the whole 'three minutes for one frame' concept. Any idea where I can like, upload the save file or something, and people can download it and watch it on their computer all they want?