Jackass star Bam Margera is suing the film’s producers over his exit from Jackass 4: Forever.The actor, who was set to star in the newest sequel – scheduled for release on September 3 – filed a complaint today (August 9) claiming a violation of his civil rights after producers made him sign a “Wellness Agreement” and fired him after a positive drug test, claiming he broke his contract.According to the Hollywood Reporter, Margera allegedly said he suffers from physical and mental disabilities,