Sock in the jaw

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Movies routinely stage brawls, with bad guys punching good guys and good guys punching bad guys, with repeated socks to jaw.

Fact is a sock in the jaw will often lead to a broken jaw or a broken hand.

It is typically done by trick photography --- the clenched fist --- smacking the open palm of the puncher. (The hand is quicker than the eye.) The sound is put in later in post-production.

Pic: Enlarge ){ an emotican showing a sock in the jaw.