Joker

I watched the movie Joker through DVD last night since my American friend recommended me to watch it. The movie should not supposed to be watched by people under 15 years of age because there are many violent scenes such as killing people by gun and serious car accidents. The main antagonist who is a handicapped person who was abused in his childhood is a comedian, but he was fired and he killed three passengers in the train with gun because they teased him. Since then, he killed his mother and his previous colleague. The underlying factor is a polarized society between rich and poor. I learned a dark side of the American society.