The pinball table the two Southern gentlemen play was designed to be shaken as it has no flippers. Pinball flippers first appeared on Gottlieb's 1947 machine Humpty Dumpty.
The goose uses a silk-stockinged mannequin's leg to get a car to stop while hitchhiking. This is reminiscent of Claudette Colbert's hitching method after Clark Gable's repeated failures in It Happened One Night (1934).
The print shown on TCM has had the insensitive stereotypes of African-Americans removed as evidenced by the stills in the Photos section of this entry.
The driver of the red car who speaks gibberish is comedian Cliff Nazarro - this was a big part of his shtick.