So, in my current fortress, I've been making serious use of cavern resources for pretty much the first time. I've finally imported enough steel to set up a squad of axedwarves (having relied on silver hammers and iron spears up to this point) and I decide to send them off to kill a pack of crundles on a map edge in the caverns to gain some basic competence. The crundles are virtually no threat to them, but of course the very instant they strike down their first couple, every dwarf in the fort decides that this would be an excellent time to run down and collect all their severed limbs for butchering. So before long I've got about a dozen dwarves running around the caverns in a panic while my military desperately tries to kill off the rest of the crundles before anybody gets hurt.
I finish them off, but before the corpses are all carried away, ratmen move in from the same side of the map. So now ratmen are chasing around a quarter of my population while they keep showing up to haul corpses. The axedwarves kill them off, but then before the ratmen corpses are hauled, a couple of blind ogres show up in exactly the same place. So I kill the blind ogres, and then a group plump helmet men immediately show up from the same map edge! Finally something goes wrong and a hauler gets his skull smashed through his brain in a single punch. At which point the axe squad, in a berserker rage, assaults the aggressor, systematically hacks off all four of its limbs, and then the commander knocks its head clean off with the flat of her axe.
Mercifully the next monster spawn decided to come in on an inaccessible island on the opposite end of the map and the nightmare finally ended. I really need to turn off refuse collection the next time I go hunting.