Late Show with David Letterman S13 E190 Jessica Biel, Christina Aguilera

Throughout the night, a guy named Bob Zick stands over by the staircase and laughs at everything Dave says; Samuel L. Jackson stars in the much-hyped sequel "Snakes in a Deli"; elderly sock puppet expert Jack Fisette has a demonstration with Dave; Fatboy Slim performed "That Old Pail of Jeans."