Ketawa serem means scary laugh in Indonesian, and clips with this name circulate widely on Indonesian social media and soundboards as a generic horror reaction. The second version is shared as a short standalone file rather than a scene from a known film or show, so its exact recording source is unclear. Online, creators reuse it for haunted house pranks, ghost story edits and creepy meme posts, pairing the laugh with dark visuals and sudden suspense for instant tension. Its brevity keeps it popular for quick scare effects in short videos.