Late Show with David Letterman S08 E178 Reese Witherspoon, Jonatha Brooke

Dave announces that he may have parasites crawling around head, prompting Paul to call him a "maggot brain"; Dave and Steph/Monty go over vacation pictures; Dave confirms that he has parasites by taking a sentence on a blue card too literally; a guy bouncing a giant tether ball to his head makes an appearance on "Is This Anything?"