Chris Brown had an extended heated exchange with some fans at a celebrity basketball game over the weekend. It's hard to tell from the video what argument was about, but eventually the police had to get involved to calm the situation down.
I am going to chalk it up to Chris Brown being Chris Brown. It is possible someone didn't like the fact that he refused to stand for the National Anthem. But the more important question to the whole thing is not what happened, but why is Chris Brown being invited to a charity event?