Place it at the start of a clip to summon the subject, then follow it with a reaction sound once they turn around. A deadpan bruh works after a failed prank, while a scream meme fits a bigger overreaction. Keep the whistle first so the reaction feels earned.
關於此聲音
This is a short whistle lasting about four seconds, with a clear, piercing tone that cuts through background noise. It feels playful and cheeky, like a quick call to get someone's attention or interrupt a quiet moment with a joke. The bright, sudden sound makes it easy to notice and hard to ignore.