Here’s maybe the most famous scene from K. Gordon Murray’s English dub of the low-budget live-action Mexican classic Santa Claus. In this scene, which has given kids nightmares for years, Lupita’s dreams are interrupted by the Devil. Santa is able to see it (from his cloud in outer space) thanks to the dream-scope, created by Merlin the Magician.
This trailer is for a 2007 MST3K-style parody version:
Mas…From Mexican ‘Santa Claus’ (1959): Lupita’s Devil Dream (video)