Joaquin Phoenix’s transformation from an award winning actor to giant beard growing rapper has lead many to believe he’s gone completely mad. Last night’s interview with David Letterman that is being linked all over the Internet today has solidified Joaquin’s madness in many people’s minds. But watch the last 5 seconds of the clip and you see Joaquin snap out of it, take off his shades and have a few quick kind words with Letterman.

I hate to break it to everyone: It’s all for a fake documentary.

Joaquin’s IMDB page even lists the documentary. While it says it simply is documenting his transformation, I highly doubt Casey Affleck would be following this train wreck around with a camera if it wasn’t all an act.

That being said, I love this and can’t wait for more interviews