This descending whistle is widely recognized as a classic cartoon effect, and the published source for this clip points to the Goofy short Goofy Gymnastics, released on September 23, 1949. The file metadata also credits Hollywood Edge, showing how the sound has circulated through effects libraries as well as animation history. It remains popular because the falling pitch instantly signals a comedic drop, a mistake or a loss of momentum. Online, it is often paired with fail edits and other classic comedy timing, much like a fail sound meme.
About this sound
A quick downward slide whistle effect associated with Goofy's Goofy Gymnastics cartoon from 1949, often used for fails, drops and sudden letdowns.
This clip is a very short descending slide whistle, the classic cartoon glissando that drops in pitch almost instantly. It has a playful, exaggerated tone that makes any moment feel clumsy, disappointing or suddenly deflated. Because it lasts less than half a second, creators use it to underline a visual stumble, a bad reveal or a joke that falls flat. The sound is clean and punchy, so it reads fast in edits and works best when you want a light, old-school comedy feel rather than a harsh impact sound.