Last night Louis C.K. made an appearance on The Tonight Show with Jimmy Fallon to promote the new season of Louie, which is starting this week.

CK, always an incredibly funny guest, tells a story about the time Fallon auditioned for him while he was the head writer on Dana Carvey's show - and how he campaigned for him not to get it. Also, his ass. 

This is just a great story, and CK really is a genius.