You should never kick a friend out of your home.
Chad's drunk best friend Mark is causing problems with his rowdy behavior.
Chad wants to remove Mark from the party.
Chad leads Mark upstairs into his room telling him to rest in bed until he feels better.
Chad tells Mark that he's no longer welcome at the party, and pushes him out of the door.
Mark comes back down when he's sober, and he becomes friends with the last remaining guests at the party.
Mark gets into a traffic accident while attempting to drive home.