If you remember correctly, Jay Leno famously screwed over both Conan O’Brien and David Letterman by yanking the rug of The Tonight Show out from underneath them, despite the fact that he’s easily a worse comedian than both of ’em. So when Conan went on The Late Show with David Letterman, you knew that eventually they would both start making fun of Jay, they did not disappoint. Actually, all things considered, this is probably the nicest thing either of them could have said about Leno.