Egg Press
When a man gets up quickly, not realizing that one of his testicles has slipped outside of his underwear. The testicle gets a slight squeeze when he moves, causing a flash of pain.
John jumps up from the couch, then groans and grabs at his groin. His friends look at him curiously, asking "What's wrong with you?" John says "Oh fuck, that was a nasty egg press", & limps from the room.