In this video, we learn how to do the rear naked choke move with Scott Marker. Do this while grappling, by starting out behind your opponent on the floor. Keep your hands with a closed fist and place your arm across their chest. Now, place your other arm in between his arm and body, then hold your other hand and press your head into the back of his. Your goal is to hold onto his shoulder, then bring the other hand on the back of his head until he is choking. He won't be able to get out of this, and you will have all the control.