[WarHound]

On Armageddon we'd captured a tribal elf that we suspected of firing arrows at us. I had a Half-giant buddy with me and I put him on guard while I went to fetch water.

My character: Stay with him. Don't let him escape.
HalfGiant: Gotcha. Stay. Watch him good.
My character leaves to a water-source a few rooms away.
Halfgiant wanders in, alone.
My character: You let him escape! Damnit!
HalfGiant: No, he's still there. Won't be going anywhere. He's very sick.
My character: Sick?!
I go back to see the corpse of the elf, sitting alongside it's own severed head.

Very sick indeed.

Or one of my other favorites, between a dwarven mercenery sergeant and his favorite Trooper:

Sergeant: How about a ride up to Tuluk?
Trooper: Tuluk?! Ick. No. I would just ****. Everywhere.