The Rider Kick comes from Kamen Rider, the Japanese tokusatsu hero franchise that began in 1971. It is the hero's trademark finishing move, announced out loud before a leaping kick defeats the monster of the week. The shout became a shorthand for tokusatsu action itself, quoted by fans and reused in fan edits, games and parodies for decades. Online, the short audio survives because the delivery is instantly recognizable, even for viewers who have never watched the original series.