Late Show with David Letterman

53rd Street is the stage for the Purina® Dog Chow diving competition; Dave has choice words for Don Hewitt, who disliked a ""60 Minutes"" joke from last friday's show; Dave shows ""Rejected FDA Items"" such as Elmer's® glue with ten essential vitamins and minerals, ""Goat-umms®,"" and Tums® Spicy Jalapeño; Steph/Monty takes a plunge into the doggie water.