Place it right after the mistake in your edit, as the reaction beat that closes the moment. Build tension first with Sudden Suspense, let this clip answer the fail, then follow with Wrong Answer Game Show to confirm the outcome and move on.
Über diesen Sound
This is a just-over-a-second grunt from Twitch streamer Iocan, a single rough, low vocal burst with no words in it. It lands as pure exasperated frustration, the sound of someone watching a plan go wrong and having nothing left to say. It comes from Iocan's streams, where the grunt became a shorthand reaction for his audience.