It took mountain climber Aron Ralston (and his onscreen counterpart, James Franco) 127 hours to amputate his own limb. It takes mere seconds for this crab to pull off its own claw after an unsuccessful attack on a blue-footed booby chick.
Granted, the amputation doesn't leave it permanently one-clawed; eventually, the absent claw will regenerate. But it's still amazing to watch it dump its injured limb without a moment's hesitation. Boobies must make for a delicious snack.
[via The Daily What]