Place it right after the reveal in your edit, then follow it with Oh My God Wow for a second reaction, or put No No Wait Wait before it when the twist is still unfolding and you want the response to keep building.
关于此声音
This five-second clip is a repeated spoken 'oh', said five times in quick succession by a single voice. The repetition turns a small moment of surprise into something bigger and funnier, with a rising, can't-believe-it feeling that keeps building as the word repeats. It works as a pure reaction for moments when one surprised 'oh' is not enough.