Place it immediately after the reveal in an edit, following a dramatic sting such as Law and Order Dun Dun, then cut to a second doubting reaction with You What to keep the questioning going before the punchline lands.
關於此聲音
This is a very short French spoken line, lasting just over a second, in which a voice pleads for reassurance that something unbelievable is not true. The delivery is urgent and incredulous, turning a simple denial into a comic moment of shock. It lands as pure disbelief, the kind of reaction that makes an outrageous claim feel even bigger and funnier.