alchemist domain cause something sure did happen

"An omnibus drawn by an extraordinary mechanical horse is driven by 4Negroes. The horse kicks and upsets the Negroes who falling are changed into white clowns. They begin slapping each other’s faces and by the blows become black again. Kicking each other they become white once more. Suddenly they are all merged into one gigantic Negro and when he refuses to pay his carfare the conductor sets fire to the ominibus and the Negro bursts into a thousand pieces." PG 14 THE EMERGENCE OF FILM ART by LEWIS JACOBS