This sounds more or less like the car my 5 year old son dreamed up a few months back: "Dad, dad! What if we put a bunch of rocket thrusters on the bottom of an electric car? We could even add a really powerful fan as well. And then the car could just hover past traffic jams, and it could even drive along walls or upside down if you put the fans in reverse!".

I'll be listening even more closely to his ideas from now on, even when they defy the "common sense filter" we adults tend to have.