Nifflas on Nostr: Weird question, but I need a very effective jumpscare sound. Like, one that will just ...

Weird question, but I need a very effective jumpscare sound. Like, one that will just terrify anyone if it shows up of nowhere.

(and yes, the person about to experience the thing will know it's a thing ahead of the thing, so it's morally OK!)

How do I find such a sound? I've had bad luck on Freesound so far. License needs to be very permissive.