when you are fucking a girl sideways and you are on her leg and the other leg is on your shoulder you break the leg on your shoulder at the knee and you move in closer and fuck her harder in the ass so she screams in pain then you jizz in her butthole over and over
Guy 1: Oh my god I had to take my girlfriend to the hospital last night after we had sex.
Guy 2: Why?! Did her intestines fall out?!
Guy 1: No. We did this move called the broken propeller!
Guy 2: EWWWW she might not be able to walk again.