While walking up a flight of stairs, taking a projectile shit or sharting (fart & shit at the same time) on the person behind you.
Guy 1: Dude you wouldn't believe what my girl did last night!
Guy 2: She didn't fake it?
Guy 1: Nah, I was walking up stairs behind her and smacked her ass and she suprised me with a Cleveland Stairmaster!
Guy 2: Dude....