Trivia

    The Rocket Man appeared as an attack used by Green Generals in the game One Piece: Unlimited Adventure.

    The painted fangs and eyes are similar to the faces often painted on old war planes.

    The Rocket Man's name is based on the famous South Devon Railway Comet class, Rocket, which was renowned for its great speed.[4]

    As Kokoro pointed out, once it reached its top speed she would no longer be able to control it. In real world terms it would essentially be considered at this point a "runaway train". This is a term applied to operating trains that continue along on a track with humans being unable to control its path or speed leaving the train at the mercy of whatever lies ahead ahead of it.