Continuity mistake: When the man pulls the curtain rope at the theatre and breaks it, the bucket on a hook on the wall changes position between shots.
Continuity mistake: When the frog finishes performing "Michigan Rag" outside the talent agency, he throws away his cane. When we see the frog singing "Come Back to Eireann" after he and the man were thrown out of the talent agency, the cane has somehow managed to get back into his box again.
Continuity mistake: When the man is sitting on the park bench and the frog is singing, the outside of the newspaper is completely blank, but in a close-up of the frog croaking, writing appears.
Continuity mistake: When the 21st century demolition man discovers the box containing the frog in the cornerstone at the end of the cartoon, the frog jumps out and you can behind the box there is a document. But when we see a close-up of the frog performing in the next shot, the background is now rubble identical to the first scene.
Continuity mistake: When the agent throws the man out of the talent agency, there is a handprint on the wall to the side of the door. When the frog jumps out of the box and performs "The Michigan Rag", we cut back to the man and the handprint has disappeared.
Continuity mistake: When the man is imitating the frog to the agent in the talent agency, he is initially holding his hat, and then throws his hands up into the air. When his hands come back down, the hat has disappeared.