Joaquin Phoenix and David Letterman get awkward

So it's about time to start a new office pool, if you haven't already. Is Joaquin Phoenix's switch from acting to hip-hop some sort of hoax, or is he simply losing his mind? Maybe a more pertinent question is whether his recent subdued behavior on David Letterman was caused by some sort of chemical influence or if Phoenix was simply in character as a part of his continued quest to punk the world.

Hiding behind a pair of shades, Phoenix managed to get some monosyllabic responses to routine questions past his thick, mane-like beard. Other times he just let Letterman's questions thud, and stared out a) at the audience's laughter at his aloofness, or b) down into his lap. Whether aided by drugs or not, Phoenix certainly contributed to some of the most awkward 11 minutes in the show's history.