Late Show with David Letterman S08 E193 Kristin Davis, Nanci Griffith, Mark Borschardt

Some guy dressed up as "Lance Armstrong" comes onstage on a bicycle and beats up Alan, then runs over to Hello Deli to pummel Rupert. Later, Dave shows photos of him stuffing Steph/Monty's face into a birthday cake, while filmmakers Mark Borchardt and Mike Shank go to Comic-Con.