Place it right at the reveal, after the setup and before the reaction shot, so the accusation lands as the turning point. Follow it with Bruh for flat disbelief, or with Emotional Damage when the caught person overreacts, keeping the gotcha as the centre of the sequence.
About this sound
This is a short spoken taunt lasting just over a second, delivered in a knowing, mocking tone as if catching someone mid-scheme. The clipped delivery makes the accusation land instantly, giving it a smug, playful edge that feels like a friendly call-out rather than a real scolding. It works best as a quick gotcha, sharp enough to sting and light enough to laugh at.