Put it between a loud moment and the reveal that follows, so the edit has room to breathe. Pair Vine Boom before it to set up the joke, then follow with Dun Dun Dun for the verdict. Keep it in the middle of short edits, not at the very start or end.
About this sound
This clip is a 0.6-second stretch of nothing at all, with no voice, music or effect to fill it. It feels awkward and funny at once, like the room going quiet after a bold claim, and the emptiness makes the next line hit harder. That bare pause is the whole point.