Revealing mistake: In the process shot (dummy auto front seat, scenery visible in back window) where father and daughter are driving off to see the circus, Eddie G. makes a left turn and the scenery follows; but he forgets to return the steering wheel to center, even though the scenery shows the car has straightened out on the new course. Funny - even titans nod. That car should still be circling somewhere.
Revealing mistake: When we see the duckling growing up to being Daffy Duck, the calendar behind him keeps changing months but the position of the days are exactly the same.