This sound is associated with Goku's Super Saiyan 3 transformation in the Dragon Ball Z anime, a scene fans have shared for years in clips, edits and reposts. The extended scream became a recognizable shorthand for powering up, going all out or taking a moment far too seriously. Online, creators use it in anime montages, gaming edits and joke before-and-after videos because the performance is instantly recognizable and exaggerated in a fun way.