Put it directly after the reveal or roast as the first reaction, then follow with Nelson Ha Ha for a second laugh or Oh My God Wow when the moment deserves a second, bigger reaction. Sudden Suspense works just before the reveal to set up the payoff.
About this sound
This is a brief spoken reaction, under four seconds, built around a single emphatic, stretched-out 'damn,' delivered in one quick burst. It lands as impressed disbelief with a lightly mocking edge, the kind of instant response that makes a roast, fail or surprising reveal feel bigger. Because the word is so direct, listeners get the joke at once without needing any setup.