If you didn't see Friday's Letterman , in which an old-school belligerent Dave hounded a squirming Paris Hilton about her jail stay, please drop what you're doing and watch this clip. It's a little on the long side, but from the small-talk lead-in questions to a guy shouting out from the crowd, it is painfully captivating the entire time, even if -- dare I say -- you almost feel a little bad ...