Edit: So the blasting cap story is hard to pin down. Some sources say it was a man in West Virginia that did it on a dare because his buddies were trying to blow up a fish tank. In other sources, especially those that go through medic school, CLS, and other additional school house training, it was a Marine biting down on a blasting cap either in a demonstration or because they were being stupid. While I'd never personally seen such an event in real life, the images we were shown of that gentleman being treated were grotesque.

I can confirm that a man getting shot in the genitals with a 40mm LL Rubberized Pellet round will make their bits look like a crushed tomato.