Place it at the reveal, just after the pumpkin rabbit first appears, then follow it with Bruh and Goofy Ahh Sounds to extend the joke. Keep it as the answer in the middle of the edit, with the setup before it and a bigger reaction after it.
關於此聲音
This is a brief, roughly two-second meme sound centred on the pumpkin rabbit and the words 'of course', delivered as a quick spoken line. Its charm comes from treating something strange as completely expected, giving it a silly, knowing feel that lands best as a reaction. It works as a light, absurd punchline rather than a loud gag.