Forced perspective is an interesting form of art. Its a way of bringing the audiences' attention to a certain object or character. If you were to take a picture or film a clip of a woman surrounded in a rainbow of flowers and objects and her outfit were the same colors it would be hard to focus on her. But if you force perspective by either bringing her into focus and everything else out of of focus, center her, or add contrast to her outfit and complexion you can regain people's focus and make everything seem less hectic.