My nephew James, the champion wrestler, showed me a head/neck lock that he uses to great effectiveness. Basically, once he cinches this hold on an opponent, he’s toast.
The feeling of this lock is like your head is 50 feet under water and it’s about to burst, in addition there is compression on your neck.
James often goes into this hold from a hip throw.
Often the opponent's energy and momentum as he shoots can be used to throw him.
Neck and arm control. I can do little with my left hand. (Back up knife?)
Note how James uses his hip, which is stronger than my arm.
Pushing the arm up against the head
James grasps his own bicep. The pressure on the neck and head is crushing.
Another view. Is something funny?