Place it just after the reveal of the mistake, then follow it with the Kiko laugh to extend the reaction. Start the sequence with a WhatsApp message sound so the bad news arrives first, then let this clip deliver the response.
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This 11-second voice clip features a person repeating oh no several times before breaking into hearty laughter. The protest sounds half-serious and half-amused, as if the speaker can already see a mistake unfolding and cannot help laughing at it. It feels light, awkward and contagious, the kind of reaction that turns a small disaster into a shared joke.