Conan brained him with the beef bone, took his poniard and his keys, and made a leisurely departure.> - Rogues in the House
This leg, severed from the corpse of an enemy, is bloodless and stiff. Carrying it around might not be a good way to make friends, but then again it might help to make a different kind of friend.
The important thing is that it can be used as a weapon. And beating someone to death with a limb is an itch that rarely gets scratched in civilized society.