Dorfs can be hardcore little bastards. And sometimes, they take the hardcore and shit down its neck with the glorious fury of Armok, all while sleeping on a bed with a beer keg in one hand.
Also, a lil' story of my own; A forgotten beast had found its way into my fort. "Oh god, and it has toxic blood!" i thought, shortly followed by "OH MY GOODNESS THERE IS A GIGANTIC PURPLE CROCODILE WITH DEADLY BLOOD RAMPAGING AROUND IN MY MAIN HALL". So i send my silly military after it, which amounted to two steel-clad dorfs wielding picks, entirely untrained in mining (the only legendary miner i had left was resting her injuries). Obviously, i expected them to die quickly, but they FUCKED ITS SHIT UP. A few days after the fight started, they had killed it by systematically mining out almost every bone and organ in its body, with obviously bloody results. None of them sustained any injuries, apart from spontaneous bleedouts caused by infections from the blood, which went on to cause several deaths.
This fort also had a nice moment to begin with. A wild polar bear approached my newly arrived band of dorfs. There were no military dorfs among the 7, so i just set them all to military so they could have a go at the bear before it ate them. First thing that happens is that one of my miners blazes after the bear, and initiates a savage fistfight with it. Although she was on the losing side (received numerous crippling injuries, and was doomed to be a crutchwalker), she held out until the other dorfs arrived, after which they began punching it to death in a spectacular symphony of fists and beards. The bear died, and the miner became the most hardcore dorf in the entire fortress, even after a few years with more than one accident involving broken bones.