Place it at the exact reveal point after your setup line, then follow with a bruh soundboard button for the letdown or an emotional damage sound button when the fake-out stings a friend hardest in the scene.
About this sound
A short Japanese voice clip, just under two seconds, where a speaker delivers the line 'eh, uso desu' — eh, it's a lie — with a drawn-out opening sound. It lands as playful and teasing, turning a fake reveal into a quick joke and making the listener feel briefly fooled before the punchline clears it up.