Continuity mistake: When Poochini kicks Mysto out of the stage entrance, he leaves a boot mark on Mysto's trousers. When Mysto goes back into the stage entrance to take his revenge on Poochini, the boot mark has disappeared.
Continuity mistake: When Poochini discovers that Mysto was the conductor throughout the whole concert, you can see there is nothing at the far end of the stage, but when Poochini freezes Mysto and puts him back on the stage, a small flight of steps has appeared.
Trivia: During the show, there is a hair that gets caught in the projector that is removed by Poochini before continuing his performance. The joke was so realistic that many projectionists attempted to remove the hair themselves, not realising that it was part of the cartoon.