A video has surfaced that shows a Carolina Panthers fan sucker-punching another fan during Thursday night’s game against the Philadelphia Eagles. A game the Panthers would lose by five points, 28-23.According to Instagram user odubco, who posted the disturbing video, the man who threw the punches, and a woman who was with him, would not sit down throughout the game. The man who was assaulted in the graphic video got increasingly frustrated about their refusal to sit down, thus keeping him from enjoying the game. After a single mother who was sitting in the area left with her son in the third quarter, things escalated.The video is too graphic to show here on the site, but if you desire to see it, click here. After the man threw multiple punches, he and the woman he was with quickly left. It should be noted that the man who received the sucker punches did not retaliate.The NFL is looking into the matter, according to Ian Rapoport of NFL Media.