Un monsieur qui a mangé du taureau (Romeo Bosetti, 1909)
The original Un monsieur qui a mangé du taureau belongs to an early French colonial/comic genre, wherein characters eat exotic meals/meats and transform into the animals on their plates. Here, a dinner of bull meat makes a man into a raging beast. The toreros of Spain are called and come to the rescue. In a variation on this theme: a man eats kangaroo meat and must eat French snails to be restored.
In 1935, Eugene Deslaw, the abstract filmmaker (examples here, here, and here) added an introduction and a voiceover by comic sound artist and musician Bétov. Deslaw recasts the original as a Bétov “retrospective” and reclaims the film for the genealogy of the avant-garde. The film was restored by the inimitable Lobster Films.