First year of a fortress. First migrants have arrived, a couple of kids with them. Miners are mining, the carpenter is doing buckets for the cheese maker. My food supply is the ol' plump helmet and fish. And the cheese. Quite close to my pen area for the sheep, there is a yak bull. He is there since we arrived, never bothered anyone. All is well. One of the migrants show some skill with hunting, so I equip him with wooden bolts, bone crossbow and a nice quiver. Another one has no skills whatsoever, he is quiet, no dreams, doesn't understand the social and has a hard time expressing himself. This guy becomes a temporary hauler for the woodcutter until I find something he can be happy working with. Meanwhile the hunter, happy with his new fancy quiver, goes straight for the yak. Shoots the hell out on it. He goes back for more ammo and empty his crossbow on this creature again. And then again. The yak is a complete walking cadaver at this point, with bruises and broken everything everywhere. Head split open. The hunter goes to the hills and completely forget about it, probably gave up on killing this freaking thing. One of the kids, the weird one, who would hang out on the meeting hall by himself, staring endless hours at the tables and chairs, finally decides to take a breather outside. He is content, despite not liking to eat in the crowded table. All is well and the world is the same as ever.
I was occupied supervising the miners with a 7 levels deep channel we were building to bring some of the river underground and make our fishing bis an underground thing. Suddenly my cheese maker stops milking her sheep. She is in shock. The yak bull attacked and killed the weird kid while he was outside. The expedition leader goes outside to build the windmill and also finds the body. The yak attacks him as well and the two of them goes into this spectacular fight. No one is armed at this point, we don't even have a militia commander on the job. Fortune holds it that the hunter is coming back while the leader is fighting with the yak. The hunter proceeds to shoot at the thing again, but yet again it fails to die. My dwarf manages to punch the yaks mouth into orbit, spreading its teeth all over the place. Its nose is also cut off and is on the ground when the fight is over...along with its second victim. By now everyone who goes outside is shocked...except Urist Mcnosobright, who simply goes by the bloody scene, pick up the teeth, the nose and the cadavers and put everything tidy on its respective piles.