Julien Donkey Boy
Here is one synopsis I found online...
Ewen Bremner is almost scarily convincing as the schizophrenic Julian, who struggles to find his place in the world and in his own family. Having impregnated his sister Pearl (Chloe Sevigny), Julien spends most of his days with the less fortunate in life. In the opening scene he kills a child, but there is no other mention of this in the film. Julien’s universe is populated by armless drummers, people with various visual impairments and albinos. Together they provide a world where he can feel at home. When around his friends, Julian is calm and responsible. It is mostly when he is alone with his own thoughts or with his family that the schizophrenia really shows. His dominant and impatient father (played superbly by Werner Herzog) is to blame for much of Julian’s behaviour. Without support and by constantly being subjected to criticism, Julien retreats to his own room, playing out role games with himself, where he can be in control of the situation. One involves Julian as King Julian, hanging out with Adolf Hitler and warning Adolf from showing his identity to the rest of the family, as they might not approve of Julian dealing with known nazis. While scenes like these are often very funny, they are delicately executed and at the same time very moving. Julien's sister Pearl is the only one that understands him in the family, and she plays along with his games, by phoning him and pretending to be their dead mother etc. However, their relationship is far more complex than just a simple-brother relationship, and although we're never explicitly told, we know that Julien is the father of Pearl's child. Julien's brother Chris wants to become a professional wrestler, something their dominant father supports and tries to stop at the same time. Subjecting Chris to various cruel treatments to improve his skills, the insults are never far away. The father is an extremely complex character, still in mourning of his dead wife. When he's is not dishing out insults or trying to discipline (actually, he gets other family members to do the disciplining) he wears gas masks and tries to get high by consuming various types of medications. And finally there's the grandmother (played by Joyce Korine, Harmony's own grandmother), an old woman who spends most of the film looking confused or playing with the family dog, Punky. So, all in all, your standard American family then? Well, not really, but while the characters might seem extreme in print, they are treated with utmost respect by Korine and like in Gummo, he manages to make the surreal seem real.