Out of the many guests on David Letterman's final Late Show, one highly anticipated cameo didn't end up happening. Jay Leno, who we all speculated might turn up to end their long-standing late-night feud, did not make an appearance. In a new interview with Adweek, Leno finally disclosed what happened. "Well, I asked Dave to do a 10-second tape for us [when I left]," Leno explained. "Anything, just, 'Leno who?' They said no, they didn't want to do it. Well, why am I going to run all the way to New York? I mean, quid pro quo. I just said, 'No, that's kind of silly.'"
There you have it! These two grown men will be feuding until the end of time.