The phrase comes from Mighty Morphin Power Rangers, the American television series that debuted in 1993 and introduced teenagers who transformed into costumed heroes to battle villains. Said before each transformation, it quickly became the show's most recognisable catchphrase and a shorthand for getting ready to fight. As clips from the series circulated online, the line was reused in memes, reaction videos and edits, where its heroic delivery still signals that an ordinary person is about to step up.