Place this clip as the reaction beat right after the reveal in an edit, then follow it with the sudden suspense sound for a mock-serious turn, or precede a bigger response with the oh my god wow button when the fact escalates.
このサウンドについて
A very short spoken clip of a voice saying 'Ca c'est interessant' in French, the phrase meaning that's interesting. Delivered in under a second, it feels dry, curious and lightly amused, like a polite reaction that also hints at mild surprise or sarcasm, making a small moment sound more intriguing than it really is.