Late Show with David Letterman - Season 6 Episode 142

The secret word is ""carrot,"" and Dave introduces another supposed winner (writer and Boston native Jay Johnson); to prove a point, Dave quizzes Paul on a cut of meat; during a new segment called ""Alan's Celebrity Birthday,"" a caption reading ""jackass"" with an arrow pointing at Alan appears on the screen, so Big Red storms off to the control room and punches Jerry.