Place it at the end of a waiting or countdown scene, just before the reveal, then follow it with a funny laugh for the payoff. For a darker twist, swap that second laugh for an evil laugh, and use a drum sting earlier in the scene to mark the false finish.
關於此聲音
This roughly 11-second clip pairs a steady tic-tac ticking rhythm with a long, rolling burst of kkkkkkk laughter, the kind typed out when someone cannot stop laughing. The ticking builds a small sense of waiting before the laughter takes over, giving it a playful, teasing feeling that works best as a light reaction to something silly, awkward or suddenly funny.