Joaquin Phoenix on David Letterman

OK, no deep thoughts, discourse, or editorial here. Just plain funny! Joaquin Phoenix was on David Letterman last night and made a complete fool out of himself. Letterman at first was being gracious but finally gave in and just started having fun with it… at Phoenix’s expense. The clip is REALLY funny and painful at the same time!! Then the question to ask is

* Was he just being a jerk on purpose?

* Was he on drugs?

* Was it a setup by he and Letterman?

* Was he doing it just for fun and to see if he could?