Fans got super excited during the San Francisco 49ers vs. Arizona Cardinals game. The excitement soon turned into a heated exchange, then a violent brawl that ended with at least one person injured. Oh and get this -- the melee all went down while the two teams battled it out on the field.
In a video of the brawl, fighting fans are seen falling down stairs and stumbling over stands.
The security guards finally managed to get things under control. Six people were arrested and several people were ejected from the game.