As of last night, Jay Leno has exactly one month left as the host of The Tonight Show, so not surprisingly things are getting sentimental. Last night, Louis C.K. talked about not buying his kids Christmas gifts, American Hustle, finally releasing Tomorrow Night (his black-and-white first film from 1998, which Jon Stewart, Chris Rock, and others each loaned him $10,000 to make), and his appreciation of Leno, who has always been really supportive. The good-bye takes place around the four-minute mark of the first video, but, come on, you know you’re going to watch all of them.