Put it just after the mistake is revealed, then follow it with the Metal Gear Alert as the next beat, and save the Law and Order Dun Dun for the moment someone gets caught explaining it.
Über diesen Sound
This three-second clip has Wallace shouting that he has a bomb in his pants in a high, flustered British voice. The line lands as funny and panicky at once, turning a small worry into a ridiculous emergency. It comes from Wallace and Gromit in A Matter of Loaf and Death (2008).