By now, we have all seen the miraculous finish to the Kentucky/LSU football game. After the receiver catches the ball, it appears to me the receiver starts to "strut" and celebrate at the 5 yard line. Was this a violation? If it was, what would the penalty have been?

Unsportsmanlike Conduct, deadball, penalized on the try.

You would have to be a real hardass to call that. But the TD would still stand, as it's USC, 15-yards from the succeeding spot (try).