Watch The Bad Genius (1932) Official Trailer

Somehow, Oopie's become a child prodigy on the Bass Viol, and practices with Scrappy playing along on piano. On the day of his big solo premiere, an accident takes place and Oop's knocked out. Not wishing to disappoint the show's patrons, Scrappy rigs up the unconscious savant with wires like a marionette to simulate a performance.