Put it right after the reveal, not before it, so it answers the twist. Open with It Was At This Moment He Knew to set up the turn, then let this clip react, and finish with Clapping when the surprise deserves applause.
關於此聲音
This is Owen Wilson delivering his signature drawn-out 'wow' in a single short burst lasting under a second, with his warm, rising voice stretching the word into a look of delighted surprise. It feels playful and gently amazed, like catching something unexpected and enjoying it, and it comes from the actor's much-quoted habit of dropping the word into his film roles.