Place it at the exact moment of consequence, after the setup shot has landed. Lead in with a classic fart sound effect for the false alarm, then follow this clip with a vine boom sound effect if you want a second, drier punchline for the reaction cut.
關於此聲音
This 4.7-second clip layers a toilet flush and splash into a sudden grenade-style explosion with a deep boom and rattling debris. It feels gross, chaotic and wildly disproportionate, turning a normal bathroom sound into an instant disaster joke that lands even without any picture.