Baghdad Buckshot

When you say goodbye to a friend who is leaving on his bicycle, and when he isn't looking, you pull out a shotgun and stealthily shoot his rear wheel.

Person 1: On my way home i noticed that my rear wheel was empty. I also had several bullet holes in my back.
Person 2: Haha! The good Ol' Baghdad Buckshot.

Czech Bicycle

When a woman puts her legs and hands up and you sit on her legs and put your hands on hers, pretending like you're sitting on a bicycle. Then you press down on her tits with your feet, alternating between left and right.

Man, you haven't lived unless you've ridden the Czech Bicycle. It literally takes their breath away.