Joaquin Confronts Fan At Show

Joaquin Phoenix appears to be getting in the act of being a petulant hip-hop star.

Early Thursday morning, he jumped off the stage during a short performance at a Miami Beach nightclub and confronted an audience member. Security guards dragged Phoenix back on stage and escorted him away.

It's unclear whether the confrontation _ and his pledge to quit acting and start rapping _ was real or a put-on. Actor Casey Affleck recorded the performance on camera.

In October, Phoenix's publicist confirmed he was making the career switch. In January, he performed at a Las Vegas nightclub, and the next month, he made a strange appearance on David Letterman's "Late Show." Actor Ben Stiller lampooned that appearance at the Oscars.