Place it at the end of a short reaction sequence, after the setup line has landed and before the cut to the next scene. Pair it with a Bruh reaction for a double take, then a Goofy Ahh Sounds cue if the edit needs one more beat.
このサウンドについて
This 2.4-second meme clip is a single flat vocal built around the word MouM, short enough to drop into a reply without breaking its flow. It lands as a puzzled, deadpan shrug in sound form, the kind of noise you make when an answer is not worth a full sentence. Its blank, offbeat tone makes it easy to read as confusion, dismissal or quiet amusement, depending on where it drops.