Place it just before the reveal in a fail edit, after Sudden Suspense Sound Effect builds the tension and before Wrong Answer Game Show confirms the mistake, with Knuckles Oh No Sound saved for a second, smaller slip later in the same clip.
About this sound
This four-second voice clip has Bomby from Battle for Dream Island blurting “Oh no, oh my gosh” in a rising, frantic tone as trouble dawns on him. It feels anxious and funny at once, like a cartoon alarm going off in someone's head, because the panic is too over-the-top to feel serious. The line comes from the animated competition series Battle for Dream Island, which debuted in 2010.