Fanbases get rowdy during critical games. When emotions are high and there are a few beers involved, a fight can start. And that’s what happened at TD Garden during Game 7 between the Wizards and Celtics. Boston came through with a series clinching 115-105 win.

According to Albert Breer of Comcast SportsNet New England, a Celtics fan slapped a Wizards fan at some point during the game. The Wizards fan took offense and punched the Celtics fan, causing a bloody mess.

Per my buddy @daverstevens, a Wizards fan did score a win for D.C. on the undercard tonight at the Garden. pic.twitter.com/DAgpjX8uAh — Albert Breer (@AlbertBreer) May 16, 2017

@jasonrmcintyre @daverstevens Blood. Source: Celtics fan slapped Wizards fan, Wizards fan responded by knocking Celtics fan out. — Albert Breer (@AlbertBreer) May 16, 2017

I get fans will get in arguments during games, but this isn’t a sign of good sportsmanship to say the least.

UPDATE on May 16, 2017 at 12:25 p.m.: There’s video on the internet of the fight. It is not pretty. Fighting people at sports games or really anywhere is a bad idea.