Put it immediately after the strange object is revealed, then follow it with the Bruh Meme before the explanation begins, and save the Fail Sound Meme for the moment the wrong name is finally corrected.
About this sound
This is a two-second voice clip of Joe Pesci asking what you call these, delivered in a puzzled, slightly confrontational tone that sounds like he is questioning something right in front of him. It feels awkward and funny at once, turning a simple question into a challenge. The clipped delivery makes it land as a quick reaction to confusion, misnaming, or an odd object.