During doggy-style anal penetration, smashing a pumpkin over your partner's head at the moment of climax. May result in paralysis or death.
Guy 1: Why is there jack-0-lantern goo all over the living room carpet?
Guy 2: Dude, I was banging the hell out of this chick over the arm of the sofa when I totally ichabod craned her.
Guy 1: Happy Halloween, bee-yotch!