David Letterman has some fun with the 'Late Show' outdoor and indoor Hose Cam at the expense of Zach Galifianakis.
Galifianakis was on the show to promote his new film with Will Ferrell, 'The Campaign'. So the appearance gave him a chance to tell a story of how he got his co-star to moon a group of autograph seekers:
Galifianakis chose to wear the same suit as Paul Shaffer:
