The Duke-NC one makes me smile.It's a whole thing - there's also the guy that shouts High Tide to Bama players, the Super Baylor fan getting to his seat in the heart of the KU student section, and the Notre Dame guy that storms the court only to find out they haven't won yet, they are going to OT. There are probably more.
I knew I forgot one - the guy in Duke gear that goes to meet his gf's family for the first time, and they are all UNC fans.