James Dower sits astride the "Tilt and Turn" at the International Exhibition of Inventions in Geneva on April 10, 2013

James Dower sits astride the “Tilt and Turn”, a petrol-powered tricycle whose trick is a flexible axle, at the International Exhibition of Inventions in Geneva on April 10, 2013. “It’s a very simple design really. Nothing can go wrong with it,” Dower told AFP.