Did the guy use a racial slur? Probably.
But, you have to have composure.....you do not physically assault someone for something they said.
And for those saying they would beat the hell out of someone for calling them a name.....newsflash, that is ASSAULT.
You cannot physically assault someone because they said something that hurt your feelings or offended you.....no matter how stupid they are or what the statement was.
The punishment for Smart was warranted. And, there should be punishment for the fan. My understanding is that he will not be allowed to attend any TTU games (home or away) for the rest of the season.