The clip comes from the Mickey Mouse cartoon The Worm Turns, released on January 2, 1937, where cartoon sound effects were used to give animals exaggerated personalities. Short lion growls like this became reusable stock effects in animation and later in online editing, because a single snarl could stand in for any big cat. As soundboards and meme videos grew, creators kept using the vintage growl for pets, wildlife parodies, and mock-serious nature moments where a real roar would be too long or too intense for the joke.