Split (2016) IMDb 7,3/10

Did you watch this movie?
If not, please do, you won't regret it is one of the movies that I highly recommend.

It is about man who has a personality disorder disease, namely has more than 20 persons inside his head.
James McAvoy embodies the protagonist of action, most of his personalities decide to kidnap 3 young "sins" who supposed to help them release the 24th person inside James McAvoy's body which they call Beast. All the personallities of the main character believe that Beast will help them rid of the "normal" people who persecute them and prove that people with disrupted personality are better than ordinary healthy people. The belief of multipolar person are so strong that when he turend into Beast his strenght rise up to annorbal level.
I will not reveal you more than this.

In real life people with personality disorder disease usually experience huge tragedy in their lifes which they can't handle with so they develop personality who is stronger than themself.

There are real life cases where a man in his bipolar personality does not suffer from diabetes or improves his vision, gaining superior power ...
They are the proof that human mind can completely control the body, but we are not capable of doing that yet