OK, on the one hand, this rolling "Superman Simulator" looks insane and fun. You get strapped in hanging face-down and you get to feel like you're flying a few feet above the ground.
But on the other hand, flying wasn't Superman's only power. He also had super strength. That came in handy for hard landings. If this thing goes down a hill, you might not stand up as well as Superman does when he doesn't nail the landing. Just food for thought.