The movie "Barbershop" is a really funny movie, mostly because of the acting of the black actor who goes by the name of "Cedric the Entertainer." It's about the goings on in a barbershop in a predominantly black inner city neighborhood. Cedric plays the gray haired eminence among the barbers, and is always coming up with politically incorrect pronouncements which are met with boos and jeers from the customers and other barbers. In one scene he says (paraphrasing), "I'm sick of hearing about Rosa Parks, Rosa Parks. All she did was sit her big fat, lazy ass down on a bus." The politically correct crew at the barbershop went nuts.
Like all good comedy, there's at least a grain of truth to this statement.