Watermelon Man is a 1970 black comedy directed by Melvin Van Peebles and starring Godfrey Cambridge and Estelle Parsons.
Plot[]
White insurance salesman Jeff Gerber (Godfrey Cambridge) wakes up to find that his skin color has turned from white to black. He soon finds out what it's like to be a black man in America, being discriminated against the way he himself used to discriminate against blacks.