Best animated movie mistakes of 1940
Continuity mistake: The Italian peddler puts some weighted horse shoes on Spunky to inhibit his movement. As the Peddler is leaving and says he will be right back, Spunky is facing him into the building. But then it cuts back from the Peddler to Spunky and suddenly he is facing out the building the opposite direction. It's only after this when he tries to move that he discovers his feet too heavy to lift, yet somehow he got turned around in an instant.
Continuity mistake: When Elmer is setting up the camera to try and photograph the rabbit, you can see the rabbit is lying on grass. But when we see the rabbit from the camera lens, he is now lying on plain ground, and when viewed from the lens a few shots later, he is lying on the grass again.