Sniper

You easily find a good hiding place and secret yourself in it.  It's so good, in fact, that no one sees you at all the whole game!  Of course, you don't see anybody else during your hiding, so you end up with 0 points.

"That's the first time I've ever seen that happen," the attendant says when you turn your vest back in.  "It must be, like, broken." 

He looks down into the gun and pulls the trigger, shooting himself in the face.  "ARGH!"  He begins hopping around.

Shrugging, you head to the only restaurant in town.