Cheese It, the Cat! (1957)

Continuity mistake: When Ralph is walking up the steps to his apartment, he has a present in his right hand. The present disappears when he goes through the doors, but re-appears when he enters the kitchen.

Continuity mistake: When Ned and Ralph are at the clockwork toy, the toy has a lever on its side. But when the toy comes to the cat, the lever is missing.

Continuity mistake: When the cat jumps up and stops next to Ned, you can Ned is well away from the cat. In the next shot, Ned is much closer to the cat than he was previously.

Trivia: When Ned is launching Ralph on the bottle of champagne, the label on the bottle says "Selzer's Champagne Extra Dry" - a reference to the Warner Brothers producer Eddie Selzer.