The Mickey Mouse short “Minnie Takes Care of Pluto”, which was pulled for its surrealist and dark nature. It's a crime that the “Mouse Works” era episodes are still not on Disney+ :
Knick Knack - Director's Commentary Review | Pixar Post
Knick Knack (Short 1989) - IMDb
Pixar Shorts: Knick-Knack Mermaid by Lizlovestoons12 on DeviantArt