5 dead dwarves, 3 dead dogs, an exploded yak, and 4 seriously injured and numerous minorly injured dwarves later, the operation was an entertaining success. I didn't account for the fact that the room would leave a fresh cloud of dust for every level it fell. I dropped the room 30 floors. The blast cleared walkways and side tunnels. In one case, a gelder who had been, bafflingly enough, climbing up the bore was thrown clear of the pit entirely. He had been three levels below the surface when I dropped the room and ended up nine tiles away as a mangled lump of bone fragments and meat paste on top of the hospital. I know this because the game, obviously, auto pauses when a collapse occurs. I took the time to look and see what was what. Oddly enough, there is a combat log for every dwarf involved in the drop, except kogsak. He just died outright when the room fell. No combat occurred. The game just decided "welp, this fucker is gonna be dead, better pull the life out of him."