Place it after a short suspense cue and before the reaction shot, then follow it with a quick laugh to close the moment. A wrong-answer sting works well just before it in a fail edit, while a cartoon slip can follow the reveal for a second comic beat.
关于此声音
This is a single human voice holding one long haaaa for about nine seconds, somewhere between a yell, a laugh and a deep exhale. The stretched delivery feels silly and overblown, turning a small reaction into comic tension that keeps building instead of landing quickly. It works because the shape is instantly recognisable, so listeners get the joke before the sound has finished.