The sound comes from Dragon Ball Z, the long-running anime sequel to Dragon Ball, where Saiyan fighters such as Goku and Broly transform into the golden-haired Super Saiyan form when pushed to their limits. The power-up sequence became one of the series most imitated moments, and fans began lifting the audio for AMVs, gaming videos and reaction edits. As short-form video grew, the clip spread further as shorthand for levelling up, getting serious or unlocking hidden strength, which is why it still appears in memes long after the original episodes aired.