Incident from Don Quixote

In one of his dreams, Don Quixote is fighting monsters. Having vanquished them, he goes to put on his armor, only to be met with a succession of strange events: first the armor appears occupied by a creature with stretching limbs, then a lovely young woman appears and sprouts butterfly wings. As Quixote approaches her, the wings become giant tentacles and attack him. Just as Quixote is fighting back and reaching for his lance, he wakes up to find himself pummeling his servant Sancho Panza. This film is currently presumed lost.