Online, Susto do Leko circulates as a short reaction sound shared through meme soundboards and short-form video edits, where its brief length makes it easy to drop into a punchline. Its Portuguese name points to a scare or fright, which matches how creators use it for startled reactions rather than for music or dialogue. Because the clip is only about three seconds long, it fits jump cuts, prank reactions, and surprise reveals without slowing a video down, and that practical, reusable timing has kept it in rotation for reaction-style content.