Put this clip at the exact moment a phone appears on screen in your edit, before any dialogue starts. Follow it with a confused reaction sound or a record scratch to underline the reversal, then cut straight to the person's baffled face for the payoff.
關於此聲音
This clip is Samsung's familiar default ringtone played backwards, turning its cheerful melodic chime into a warped reversed tone. It feels uncanny and funny at once, like a phone ringing from another dimension, familiar enough to recognise instantly but strange enough to make listeners pause and laugh at how wrong it sounds.