Place it right after the reveal in your edit, then follow it with the Law and Order Dun Dun for a courtroom-style sting, or lead into it with the Metal Gear Alert so the trap feels spotted just before the reaction lands.
About this sound
This is a one-second voice clip of a decoy saying “Oh Dang!” in a flat, caught-out tone. It lands as a quick burst of awkward surprise, funny because the reaction sounds resigned rather than shocked. The line comes from To Catch a Predator, where a decoy greets a visitor who has walked into the setup.