What
This fast shoulder lock is used by Nak Muay Pram to counter grabs or head punches. It is a brutal technique that can easily dislocate the shoulder and simultaneously damage the elbow joint.
Why
Attacking the arms of the opponent is a proven tactic of Muay Pram. When the shoulder is damaged or dislocated, it is almost impossible to keep of fighting. For this reason or grapplers train hard to develop trapping and holding skills that allow to execute this kind of technique.
How
When the opponent throws a head punch, parry the blow from the inside with one arm and simultaneously wrap the attacking limb with the other. Push forcefully forward and down with the arm that parried the punch and pull towards your center with the other to break the shoulder joint.