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Sharing a video on his Instagram page, Margera said: "Morning everyone, I have some good news.
"I realised that I'm manic bipolar and yesterday I had to go so bats*** bonkers f***ing crazy because of not knowing the answer for a year and a half whether we're doing Jackass or not.
"I had to go f***ing bonkers. I had to deal with the madness to finally know the answer. Now I know exactly what I want and it's going to be f***ing awesome and it's going to be a way where everyone wins in the end.
"So, I love everybody, and there'll be no bad blood this way, it's going to be f***ing awesome, so I'm seeing a bipolar specialist today to get that underway, and - other than that - we just have to find a time and a place to film all this rad s***, and you're all involved."
He concluded: "Rock and roll."
In a now-deleted video post the other day, Margera hit out at Paramount Pictures, alleging that the company forced him to take breathalyser tests and provide urine samples, and claimed he was filmed while taking anti-depressant medication.
He also urged fans to boycott the movie when it is released.
The fourth Jackass movie was announced in December and will be the franchise's first film since Jackass 3D in 2010.
It was due to be released in March 2021, but had to be pushed back - like so many of the movies slated for release in recent times - because of the coronavirus pandemic.
This will also be the first movie that the remaining members of the Jackass gang have filmed since the tragic death of their friend and fellow cast member Ryan Dunn in 2011.
The first three films in the series, released in 2003, 2006 and 2010, were all box office successes, which was achievable at least in part due to the fact that they are relatively inexpensive to produce.
For a budget of less than $20m per film, they have returned $335m at the worldwide box office.
As for Bam, let's hope that he gets the help he needs.
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