Season one, episode 7, toward the end. Kenneth, the NBC page, is on the Conan O'Brien set, imagining that he's being interviewed by Conan. He goes "Well, I do know how to clog, who told you that? Do you guys want to see it?"

And dude got up. And clogged. Like, for real, actual clogging. I heard that and was like "Psh, there's no way he's actually going to clog." Darn if he didn't do it! A couple of basics, a windmill and a bell kick!

Check that out!