Garfield may hate Mondays, but a couple theatergoers at "The Garfield Movie" hated each other more ... getting into an all-out brawl, with one of the guys being a pro boxer!
This wild video is making the rounds online -- and it captures the moment in a Spanish movie theater many are calling a real "cat fight" ... kicking off when a man in green athletic pants makes his way toward his waiting adversary at the bottom of the stairs.
People are trying to hold the guy back, but he gets through and the two dudes start going at it -- and the man who called out his opponent in green probably regrets it pretty quick.