Iraqi mortar fire
When you tighten your girlfriends anus to a centimeter in diameter and make her take a bunch of laxatives. She then waits in the doggy position until the urge to shit arrives. Upon shitting, the poo will spray out and drop on the room like mortar fire, permanently damaging your carpet and her dignity.
Dude, I totally just made my girlfriend do the Iraqi mortar fire last night. We had to call in hazmat 10 minutes later.