Place this clip at the very end of a fail sequence, after the mistake is already clear to viewers. Lead into it with a dun dun dun sting for a fake dramatic build, then let this one close the scene before cutting away.
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The Chaves Fuen clip is a 5-second comic sting built around a drawn-out 'fuen' slide that droops downward like a deflated trombone note. It feels sad, silly and instantly deflating, turning a small failure into a joke. It comes from the Chaves television series, where such effects punctuated the characters' mishaps.