Place this clip right after the reveal in your timeline, preceded by a sudden suspense sting to set up the beat, then follow it with a cartoon slip for a physical gag or a short damn as the final tag.
このサウンドについて
This is a 15-second voice clip of the phrase oh my God repeated twelve times in quick succession, each repeat piling onto the last. It feels frantic, cartoonish and funny rather than genuinely alarmed, like disbelief turned up too far. It comes from a custom Flipnote Studios style animated leader credited to kalbright3275.