Place it near the end of a horror edit, after a door knocking cue and just before the reveal. Follow it with Dun Dun Dun to underline the reveal, then cut to black before the next scene starts.
このサウンドについて
This is a short jumpscare clip, lasting about 4.5 seconds, built around the Smiler stalker name for a sudden scare. It lands as a tense, unsettling jolt, the kind that makes a quiet moment feel watched and unsafe. The tension comes from the stalker idea behind the name, turning an ordinary pause into something threatening.