 The origin is the scene where a rocket is fired from a Saburo/Hakaider's motorcycle in "Android Kikaider" which he saw in his childhood.When he was a student, he imitated this and played a game in which he attached rocket fireworks to the front fork of his beloved car and shot them all at once while chasing each other on the seashore.He talked "The chase was more interesting than the attack when I played this."