0011132: Bite->latch on->shake opens arteries even when the bite was deflected by armor and the teeth never reached flesh

ID	Project	Category	View Status	Date Submitted	Last Update

0011132	Dwarf Fortress	Dwarf Mode -- Combat	public	2019-07-31 05:51	2019-07-31 12:55

Reporter	PersonWhoFailedTheTuringTest	Assigned To
Priority	low	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Platform	PC	OS	Windows	OS Version	10
Product Version	0.44.12

Summary	0011132: Bite->latch on->shake opens arteries even when the bite was deflected by armor and the teeth never reached flesh
Description	"Bite->latch on->shake opens arteries even when the bite was deflected by armor and the teeth never reached flesh" Plate armor can deflect. Mail armor can't, but should maybe protect against this anyway (real world example: divers swimming with sharks use chainmail) extract from combatlog.txt Dwarf 12 bites Dwarf 222 in the right lower arm, but the attack is deflected by Dwarf 222's small copper right gauntlet! Dwarf 12 latches on firmly! Dwarf 12 shakes Dwarf 222 around by the right lower arm, tearing apart the right lower arm's muscle and bruising the bone and tearing apart the right shoulder's muscle and bruising the bone! An artery in the right lower arm has been opened by the attack, many nerves have been severed, a ligament has been torn and a tendon has been torn!
Steps To Reproduce	2+ armored but un-armed dwarves in the arena, let them fight for a bit look in the combat log bite deflected by armor -> latch on -> shake -> opened arteries (random)
Tags	0.44.12, bite, combat

PersonWhoFailedTheTuringTest 2019-07-31 05:57 reporter ~0039461	correction: not combatlog.txt it is gamelog.txt

Loci 2019-07-31 12:55 viewer ~0039462	The shaking doesn't "add to" the bite; it's a completely different damage vector. Vigorous shaking uses the target's own mass to put heavy strain on any connecting tissue (muscles, nerves, ligaments, and arteries). Similar damage in real life can be caused in Shaken Baby Syndrome and whiplash (neither of which typically involve a bite). Often there is a size-dominance of shaker over shakee, but not always; a particular songbird uses shaking to subdue prey up to 200% of its own size: https://www.geek.com/news/these-songbirds-use-brute-force-to-kill-prey-twice-their-size-1751373/ That being said, it is rather odd for one dwarf using his mouth to shake another dwarf's arm, but that is likely a result of limitations of the battle system AI. Overall, I'm unconvinced that this behavior rises to the level of "bug".

Note

Date Modified	Username	Field
2019-07-31 05:51	PersonWhoFailedTheTuringTest	New Issue
2019-07-31 05:53	PersonWhoFailedTheTuringTest	Tag Attached: 0.44.12
2019-07-31 05:53	PersonWhoFailedTheTuringTest	Tag Attached: combat
2019-07-31 05:53	PersonWhoFailedTheTuringTest	Tag Attached: bite
2019-07-31 05:57	PersonWhoFailedTheTuringTest	Note Added: 0039461
2019-07-31 12:55	Loci	Note Added: 0039462