Place it near the end of a slow build-up, after hallway ambience has set the scene, then follow it with a ghost attack sound once the character slips. For a meta twist, use it just before the moment he knew for a skit that turns on someone breaking character.
关于此声音
This 33-second clip is a single spoken line, 'Stay in Character,' delivered in a low, controlled voice with a deliberate pause that makes the warning feel loaded. It creates an uneasy, uncanny tension, as if normal behaviour is being forced while something strange closes in. The line comes from a Backrooms movie scene, where that contrast between calm acting and creeping panic gives it its unsettling edge.