Joaquin Phoenix on David Letterman

I watched an abscure film tonight by David Dobkin called Clay Pigeons. This was the Wedding Crashers directors first film.

I was reading about the film was it's a real low budget affair but it was produced by Ridley Scott and starred Vince Vaughan and Joaquin Phoenix. So I was reading about the Phoenix and came across an incident last February on David Letterman. You can check it out below. Apparently he was fine during the daytime but as you can see from this video, he was really out of it during the interview.