2 Part Technique - Increase your opportunities to finish from the Back with a Rear Naked Choke or Straight Choke by manipulating one of your opponent's arms into the Arm Trap. However, if he begins escaping out the back door underneath the Arm Trap, don't just transition to the armbar as traditionally taught; doing so may give him the chance he needs to get on top and ruin your control. Instead, lock your leg over his shoulder for the Cross-Legged Seatbelt, keeping his back flat on the mat. Now, you can work both of your hands in extending his arm for the armbar, leg over the face or not.