Place this clip at the reaction beat after the setup line, not under dialogue. Follow it with the vine boom sound for a bigger reveal, or precede it with the anime wow sound when building a two-step stunned response across cuts.
이 사운드에 대해
This clip is a stretched-out vocal sound spelling out 'oeooo' over about seven seconds, with the pitch held and wobbling as it goes. It feels playfully stunned and a little dramatic, like a reaction that is too surprised to form actual words and just turns into noise instead.