I learnt the hammerlock today..

alot of pple hear already will think the below
>Wikipedia Hammerlock:
The wrestler grabs his/her opponent's arm, pulling it around behind the opponent's back. This stretches the pectorals and shoulder joint, and immobilizes the arm. This is a legitimate controlling/debilitating hold, and is commonly used by police officers in the US to subdue uncooperative persons for arrest.

but it's actually something like this..haha