Place it in the middle of a reaction sequence, after Sudden Suspense and before Ceeday Huh, so the held moment sets up a confused follow-up. For a bigger payoff, follow it with No No Wait Wait when the speaker finally tries to recover.
關於此聲音
This six-second clip is a single stretched-out vocal sound, a drawn-out 'gaaaap' held on one breathy tone. It lands as awkward and funny at once, like a reaction caught halfway between a gasp and a groan, and it works best when the pause itself is the joke.