Timebomb

Timebomb is a badly injured man inside the medical clinic at Big Town. If your medical skill is high enough you can heal Timebomb and acquire a "lucky 8 ball" after doing the quest Big Trouble in Big Town. However, if you blow Timebomb's head off before healing him and before doing the quest then once you have finished the quest and healed him he will walk around town with a disfigured skull, jaw, eyes, and brain floating behind his actual head position. Not to mention his neck is still ripped in pieces.

You also have the option of putting him out of his misery. Doing so gives bad karma, and a message calling you a callous bastard.