In the opening title song "Top Cat" (seen in every episode) the waiter should be shown in front of the lunch box on the table. His torso is behind the box until Top Cat jumps up and runs for the taxi. At that point the waiter "pops" fully in front of the lunch box. This was related by Arnold Stang on the DVD commentary and he was very annoyed (even years later!) that the studio would let such an error occur every week.