The website WorldStarHipHop seems to exclusively feature videos of people fighting.  But there's a new one that's actually pretty good.  A guy on the boardwalk in Atlantic City tries to start a fight with another guy, who does his best NOT to get in a fight.

 

 

But when the first guy takes a swing at him, he dodges it and then knocks him out with ONE PUNCH.  (Search for "When Acting Hard Goes Wrong - Atlantic City."  He dodges the punch at :28.  WARNING:  There's an F-bomb at the very end.)