Place it at the start of a rising gag, before the payoff, then follow a failed climb with the fail sound and a successful one with clapping to close the joke.
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This 1.8-second clip pairs a bright slide whistle climbing upward with a quick ratchet click underneath it, giving the rise a mechanical, toy-like edge. It feels playful and cheeky, like a cartoon character sneaking upward before something goes wrong. It comes from Private Pluto, a Pluto cartoon released on 2 April 1943.