Late Show with David Letterman S11 E121 Chris Rock, The Upside Down Act

Biff makes his annual trip to Spring Training, where he for the second year in a row, he and Hideki Matsui perform Abbott & Costello's "Who's on First?" routine; Jerry turns Dave upside down to preview Kai Leclerc's gravity-defying juggling act; "Dwight the Troubled Teen" makes another visit to Alan's booth.