The Von Flue choke is a choke, popularized by Jason Von Flue in the Ultimate Fighting Championship, that is used to counter the guillotine choke. So long as your head and legs are on opposite sides of your opponent's body as they attempt to guillotine choke you, you may clasp your hands and drive your shoulder into their neck (while they are below you) to choke them out instead while making the opponent's choke ineffective.