Escape the opponent's back control depending on where the back control is taking place. If you both are seated up, attempt to pull the choking arm to the other side of your head. If you fall on the underhook side, place your head on the mat and scrape your back along the mat to remove his chest off your back. If you fall on the choking side, sink your hips down until your head pops out of the choke hold. If you are in turtle, pin his shoulder to the mat while trying to drive your head and shoulder onto his chest.