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.
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 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.
Trivia: When the man is released from the Psychopathic Hospital, he spots the construction site when he originally found the frog. The man then hides the box in the cornerstone of the future "Tregoweth Brown Building" - a reference to the Warner Brothers sound editor Treg Brown.
Trivia: When the man and the frog are thrown out of the theatrical agency, there is a business behind him named "Gribbroek Theatrical Shoes" - a reference to the Warner Brothers layout artist Robert Gribbroek.