KSI, the British YouTuber and Sidemen member known for loud, high-energy reactions, has become a regular source of reaction audio in online meme culture. Short clips of his shouting and screaming are reused far beyond their original videos, especially in gaming edits, fail compilations and TikTok reaction videos where a sudden burst of noise sells the joke. This short version works particularly well because it is brief enough to drop into fast-paced edits without breaking their rhythm, which is why creators keep returning to it for exaggerated surprise, frustration and celebration.