Place it just after the fumbling line in an edit, then follow with a Vine Boom for the punch and a SpongeBob Fail when the moment collapses completely. For a darker turn, put a Dun Dun Dun after it instead, letting the stumble set up the reveal.
About this sound
This is a short voice clip of a man with a very high-pitched voice trying to get his words out and choking on them mid-sentence, his speech breaking into coughs and strained gasps. It feels awkward and funny at once, like watching someone lose a sentence they were sure they could finish, and the sudden stumble makes it hard not to laugh.