Place it just before the reveal, then follow the discovery with It Was At This Moment He Knew for the payoff, and finish with a Bruh for the caught person’s reaction. Keep it as the turning point in the middle of a short edit, between the setup and the punchline.
About this sound
This 1.5-second clip is Morgan Freeman speaking the line “I can smell you” in his low, steady voice. The delivery is measured and serious, which makes the odd wording feel funny and slightly unnerving at the same time. It works as a knowing reaction, suggesting someone nearby has just been noticed despite trying to stay hidden.