There are plenty of theories about why Joaquin Phoenix was so out of it on Letterman Wednesday night, but the most plausible is that he was just acting. Sure, he may be drugged up, too, but then wouldn't his pal Casey Affleck put down the camera and send the guy to rehab? Affleck has been following Phoenix around filming a documentary (mockumentary?) about him, and the Daily News reports that following his Letterman appearance Phoenix and his crew went to a screening of his movie Two Lovers (where at the very least Gwyneth Paltrow would have attempted to save him with GOOP-isms).


