Place it just before the big reveal, then follow it with the awkward moment sound for the fallout and the anime ahhh sound when the character finally reacts. If the plan fails completely, close with the womp womp fail sound instead of stacking another reaction.
关于此声音
This is a very short, roughly two-second clip of a single stretched-out anime-style groan, with no words and no dialogue, just one voice stretching the letter G into a tense, wobbling sound. It feels panicked and awkward at once, like someone freezing mid-thought while embarrassment builds. That sudden, comic pressure makes it work as a quick reaction to a mistake, a bad reveal, or a plan falling apart.