Put it as the final beat of an exit scene, after the character has already turned to leave, and let Okay Let's Go set up the departure just before it. If the exit needs a second punch, follow it with Nope to close the moment without adding another farewell.
關於此聲音
This two-second clip plays the familiar spoken farewell 'thank you, come again' in reverse, turning clear words into a garbled, rising rush of backwards speech. It feels funny and slightly confusing, like a goodbye that arrives the wrong way round and makes listeners do a double take.