Meet Kadol Ledmamot, Gem Setter.
As you can see, Kadol is wounded. He spent some time in the hospital, and received plaster casts on both legs. But something went wrong, there in his hospital bed.
One arrow, stuck in each leg. You'll also fail to notice any mention of a crutch. Kadol somehow escaped the hospital, crawling, with arrows protruding from gaping wounds in both legs.
That was five years ago.
Since then, Kadol has been crawling around the fort, taking odd jobs, and changing clothes rather a lot. He's never very happy, mostly because every now and then he'll pick up a rock and haul it, for weeks at a time, and end up asleep on the floor somewhere, passed out sober, slosh-stomached and waterlogged. That is to say, he was doing these things until about six months ago, when I finally noticed him pouting and blinking in the dining room. Now he has a new job--but as it turns out, he seems to be terrible at it.
His new job is to get injured.
Since I discovered my one-dwarf bottleneck, I have been setting him at a number of tasks, attempting to hurt him badly enough to go back to the hospital and finish his treatment. He's now set up and triggered four different cave-ins, standing closer each time, getting blown across the room, skidding on internal organs. And every time, he passes out, wakes up, shakes himself off, and gets up--onto his hands, and drags himself away, none the worse for wear.
I'm going nuts. This clumsy, weak, broken guy is completely indestructible.