David Bordwell is a professor from the United States. He studies movies at a university. He thought of a way of explaining what an "art film" is in 1979. He wrote that art films are different from regular Hollywood movies. Regular Hollywood movies have a clear story and plot. Art film often have much stranger stories. In an art film, the stories may be hard to understand. As well, in an art film, the audience may have a hard time understanding what is going on. Art movies are often about people's feelings and thoughts. Art movies are often about big questions that a person has to answer about who they are or what they should do in a situation.