The NBA on TNT guys wanted in on the Nashville Predators catfish tradition.  So they transformed the set and brought a catfish to the set.  They then let Shaq and Charles Barkley work their magic.

They absolutely worked their magic.  Shaq took the catfish, chased Barkley around the set and threw the fish at him a few times. 

Shaq also poured a beer into the catfish to get the full experience.  This kind of shenanigans is what makes this show one of the best on TV.