This television episode refers to:
June 1, 2005
The day after the Super Bowl, Barney meets Emmitt Smith on the street. Barney asks him who won the Super Bowl, and Emmitt tells him he doesn't know, because he didn't watch. Barney asks him what could possibly be more important than the Super Bowl, to which Emmitt replies, "Dance my friend, dance." This is a reference to Emmitt Smith being a contestant on the reality show 'Dancing with the Stars'.