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Phoenix doc explains bizarre behavior

May 13, 2010 12:00:00 AM PDT
Casey Affleck is promising that his new documentary will answer everyone's questions about Joaquin Phoenix.Affleck followed Phoenix for a year, after the Oscar-nominated performer declared he was done with acting and becoming a rapper. But bizarre public behavior had many people wondering if the change itself was an act.

Affleck tells ABC News that nothing was faked. He says Phoenix, who has long been involved in music, was going through "an interesting period in his life."