Trivia: Series co-star Bam Margera was fired during production for reportedly failing to take cooperate with various conditions set for his appearance, such as random drug tests. After being fired, he started a lawsuit against the other creators and reportedly sent death-threats to longtime "Jackass" director Jeff Tremaine, resulting in Tremaine taking out a restraining order against him. Despite his firing, Margera did film a few scenes and does briefly appear in the finished film.
Trivia: According to former "Jackass" co-star Bam Margera, the original working title for the film was "Jackass 4: We're Not Dunn Yet," as a darkly comedic reference and tribute to cast member Ryan Dunn, who passed away 2011. However, it has never been 100% confirmed whether this was an actual working title for the film, or if Bam was just making it up.
Trivia: Series star Johnny Knoxville has stated this will be his final "Jackass" movie, and that he will be retiring from the franchise. He has cited his age as a factor, in addition to a severe brain injury he sustained during the film, which caused him to lose cognitive function and develop severe depression for a period of time. He also said that he feels he doesn't have anything left to prove after having worked on the franchise for over 20 years.
Trivia: The original three "Jackass" movies were released four years apart each. By comparison, this fourth film was released 12 full years after the release of the third film, "Jackass 3D."
