So my fort was dealing with a berserk dwarf. He and my captain of the guard were duking it out, and the berserker passed out from exhaustion. After seven pages of the captain wailing on the guy's head with an artifact bone crossbow (picturing this is both funny and disturbing), the unconscious dwarf died of suffocation.
I'm not 100% sure why. From the combat logs, there are two injuries that could be the culprit, but if either of them were actually features I'd be pretty impressed.
First, before the captain engaged in melee, he shot the guy in the guts and made him sick. Can unconscious dwarves drown in their own vomit?
Second, and probably more critically, before the guy passed out, the captain punched him in the throat and exploded his neck. With his bare, gauntletless fist. Badass. Frankly I'm surprised the guy was even alive after that, and that he lasted long enough to suffocate instead of bleeding to death. Every other time I've seen a neck explode into gore it's been an instantly fatal blow. But as for the suffocation, can dwarves drown in their own blood, or, does a destroyed neck actually prevent them from being able to breathe?
I did check all eight pages of the combat logs for lung injuries and there were none.
Also I think my captain deserves a bedroom upgrade. My fortress guards double as my only marksdwarf squad but I only have them train shooting with targets, never melee combat drills in a barracks. I also only give them wood/bone crossbows and wood shields, not even armor (beatings with metal gauntlets & boots can be pretty deadly and leather is more trouble than it's worth). They're pretty squishy but obviously the intent is for them to stay behind the melee squads. Regardless, this guy has on multiple occasions depleted his ammo and proceeded to cave in enemy skulls with his bare hands without suffering a scratch so far. I just pity whatever sorry dwarf he takes a personal interest in dispensing justice to.