Susto is Portuguese and Spanish for a fright or startle, and this clip circulates online as a short reaction sound built around that moment of sudden panic. The brief, wordless scream makes it easy to reuse across languages, since viewers do not need to understand speech to get the joke. It has found a home in meme edits, reaction compilations and short-form videos where a creator needs an instant, recognisable burst of fear. Its appeal is its simplicity: one second of shock that works as punctuation for almost any unexpected reveal.