Last night on Late Night, Zach Galifianakis interviewed Jimmy Fallon Zach Galifianakis — and he did a poor hysterical job of it. Plus: David Letterman caught Jonah Hill — and likely everyone else — off-guard with a really odd question. As Hill described The Watch, the late-night host interjected, “Now, do you carry a pocket comb?†Huh? Also, Colin Farrell had reason to believe Kate Beckinsale had laid an open-legged, fly-by fart towards him; and Rosemarie DeWitt was somewhat repulsed to find husband Ron Livingston not cheating on her, contrary to all the cheesy evidence. Watch our compilation to see what you missed.