"The Worm Turns" from 1937 was mainly made as an experiment to test the laboratory scene effects in "Snow White and the Seven Dwarfs" from 1937.
The music performed in "The Worm Turns" from 1937 is actually one of Franz von Suppé's most notable work "Leichte Kavallerie" ("Light Cavalry") from 1866.
A Spider resembling the one in "The Worm Turns" from 1937 appears as the first boss in the 1992 video game "World of Illusion Starring Mickey Mouse and Donald Duck".
The cat's lives-represented-as-nine-angels joke shown before Mickey sprays the Cat so that it attacks Pluto was previously seen in "Pluto's Judgement Day" from 1935 during the Uncle Tom sequence.