Mel (Fallout 3)

Mel is a would-be robber encountered between Greener Pastures Disposal Site and the Alien Crash Site. He wants you to give him all your money. There are several conversation options.
 * When I encountered him, the conversation options were
 * [Speech, 14%] Back off or I'll make you regret threatening me.
 * [Speech, 21%] How about I give you 5 caps and you leave me alone.
 * [Intelligence] Bullshit, A mugger is the Wasteland? A real Raider would've shot me already.
 * [Perception] That gun doesn't look loaded.
 * All right. I haven't killed anyone all day.  Let's go.
 * I can't give you all my stuff, sorry.

If you blow him off, he'll still con green, but you can blow him away and not lose Karma. You'll find a Merc Cruiser Outfit and a Sawed-Off Shotgun on his corpse. No shells though.

Trivia
This is likely a tribute to Mel Gibson's Mad Max character, though this guy doesn't have an Australian accent. Being low on ammo fits the role though.