The Washington Times - March 12, 2009, 06:53AM

Budding hip-hop artist Joaquin Phoenix leaped from a stage to confront a heckler during a concert in Miami, the AP is reporting.

The erstwhile actor appeared four hours late for the concert, mumbled unintelligibly during his performance and had to be restrained by security guards when he confronted the heckler.

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Phoenix’s bizarre behavior since his sudden departure from acting have led to speculation that he is conducting an elaborate hoax or has mental problems.

Phoenix thought the heckler was David Letterman.  He just got Letterman’s jokes about him during his interview last month.

Most people thought his leap from the stage was the best part of the show, mainly because he was no longer on stage.  It’s the most active thing anybody has seen him do lately.