Boston Celtics fan got into a trouble Friday night NBA Finals watch party.

The Celtics were defeated by 122-84 in game 4 of NBA finals against Mavericks to bring series to 3-1.

The loss on road in Dallas was the only loss the Celtics took Friday night

Fans at watch party in Boston decided to get into trouble fight.

A viral video making rounds shows a group of Celtics fans getting after it  a younger Celtics fan were throwing bombs at guy on ground.

As people rushed in to try to control the situation before it increased further.

Fight during sporting events is as American as apple pie.

Its great for internet content. not great for future CTE concerns.

The Celtics got it up on court in Dallas and fans were back home trying to eliminate each other.