I think the last game I played was Mass Effect 2 just a few days ago (doing a Renegade run, now). The last thing I killed was probably a Krogan. At least, I'm going with a Krogan because that would probably be the one most prone to wacky hi-jinks in that situation.
Me: "Who bled all over the carpet?"
Krogan: "I dunno. Some guy."
[audience laugh track]
Me: "Oh, you crazy krogans. I can't stay mad at you. Let's go get a beer or some shots."
Krogan: "I'll bring my gun."
[audience laugh track]