After watching him on Letterman, I really got the feeling that he's pulling some kind of Andy Kaufman-like stunt. Right before they cut to commercial, he took off his shades and seemed to smile at Dave, and to me it looked knowingly. Andy used to appear on Letterman when he was "feuding" with that professional wrestler guy, so I know Dave's not a stranger to pranks. Plus Casey Affleck is filming a "documentary" about Joaquin's rap career, and I have to think Casey wouldn't let his brother-in-law spiral so badly on film for real, you know? I hope I'm right, anyway. LOL