It belongs exactly on the reveal cut, after a build-up with Sudden Suspense, then let the reaction settle before adding Sad Violin for the aftermath, keeping the box itself as the visual focus throughout.
關於此聲音
This is a short, roughly four-second clip of a man shouting the question 'What's in the box?' in a frantic, climbing voice. It feels tense and shocking, with dread and disbelief packed into a single desperate ask. It comes from the 1995 film Se7en, spoken by Brad Pitt's Detective David Mills during the climax, when a long-awaited reveal turns horrifying.