Place it immediately after the scare in your edit, as the first reaction, then follow it with the scream meme for a bigger payoff and the oh my god meme to keep the reaction going before you cut to the next scene.
Über diesen Sound
This is a very short, high-pitched voice clip saying 'ih takutnye', the Indonesian phrase for being scared, in a squeaky, exaggerated tone. It lasts under two seconds and lands as a quick, playful gasp rather than real fear. The humour comes from how dramatic and childlike the delivery sounds, making a spooky or awkward moment feel light and silly instead of tense.