VIDEO!! Engaged Joaquin Phoenix attacks a fan at Miami concert!

Watch as Joaquin Phoenix turns into a complete idiot, cursing out and attacking a fan by leaping into the audience at the Fountainebleau Hotel in Miami. In response to a heckler, Phoenix went into an expletive-laced tirade and boasted about his financial superiority. "I've got $1 million in the bank. What have you got? " According to Radaronline, Phoenix then launched himself into the crowd, which had been waiting around four hours for the "hip-hop star," and attacked the man. The crowd chanted "beat him up, beat him up!" or something like that. It's hard to hear in the video. Security guards quickly responded by dragging -- not the heckler -- but Joaquin, the evening's star, out of the venue. Curiously, Phoenix's brother-in-law Casey Affleck was there capturing the whole evening on video. And for those who think this is all part of some bizarre Andy Kaufmanesque act, it does bring memories of Kaufman's violent wrestling mania moments. Theatre of the absurd, anyone? But somehow we don't think this is a joke. And if it is, it's not funny. Does anyone else think this guy is self-destructing in front of our eyes? Phoenix makes Crazy Days Britney Spears -- at her windshield-bashing, head-shaving, crotch-flashing best -- seem positively subdued and sane. At least she didn't jump off the Video Music Awards stage and attack a fan, right? Although, that would have made her performance there worth watching ...