Robber shoots himself in the nuts.

[JWBear]

Here's a quote from the rules section:

We are not talking about common stupidities such as falling asleep with a lit cigarette, or taking a bath with a radio. The fatal act must be of such idiotic magnitude that we shake our heads and thank our lucky stars that our descendants won't have to deal with, or heaven forbid, breed with descendants of the fool that set that hare-brained scheme in motion.