Somebody posted cell phone video of a guy who's arguing with his girlfriend on a busy city sidewalk. It was St. Patrick's Day, if that matters. Anyway, he gets so frustrated that he suddenly runs straight AT a store window and head-butts it.
It shakes him up for a second and he falls to the pavement . . . but he gets back up and tries to reason with her as she walks away.
(WARNING!!! There's profanity. Search the Twitter page of @DrewBrands44.)