Six Men Getting Sick

Six Men Getting Sick (Six Times) (sometimes known as Six Figures Getting Sick) is a 1967 experimental animated short film, directed by David Lynch. A student project that was developed over the course of a semester, it is Lynch's first film and was shot while he was attending the Pennsylvania Academy of the Fine Arts in Philadelphia, Pennsylvania. The film consists of an animated painting, depicting six dysmorphic figures regurgitating in sequence with the sound of a siren loop.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.