So Norm MacDonald's in town this weekend, doing standup at Helium. I will be going, and I'm excited—but I'm also stoked that I now have an excuse to post a video of MacDonald's 1998 appearance on Late Night with Conan O'Brien, which might very well be my favorite talk-show appearance of all time. This segment is ostensibly an interview with Melrose Place's Courtney Thorne-Smith, but Norm steals it. "You're the biggest ass I ever met!" a laughing Conan tells MacDonald at one point. Little does he know that Norm's just getting started.

... and no one ever heard from Courtney Thorne-Smith ever again.