My pal Kliph Nesteroff just posted a link to this to Twitter. It's an old Saturday Night Live sketch from January 11, 1997 with Norm MacDonald, Mark McKinney and Kevin Spacey spoofing what David Letterman's show had turned into by then. Wanna know why Leno started beating Letterman? I think this hits on some of the main reasons. Kliph says Stephen Colbert contributed to the writing of it, by the way…