Joaquin Pheonix's personal meltdown became more and more noticeable as his beard grew longer and the shades stopped coming off. The climax of it all was when he appeared on The Late Show With David Letterman. Avoiding eye contact behind his shades, barely speaking and stating that he planned on retiring his acting career to start his rap career, Joaquin shocked us all. His entire meltdown was actually captured on camera as a documentary known as I'm Still Here: The Lost Year of Joaquin Phoenix by Casey Affleck, and is said to come out in September. (Fame Pictures)