It's certainly a head-turner. Whizzing around the streets of Berlin - this is the "ErockIT". Half-bicycle, half-motorbike, Stefan Gulas has been working on his invention for the past four years: [Stefan Gulas, ErockIT Inventor]: "It's a motorbike and in a certain sense it's also a bicycle, because the motorbike works as a bicycle. So you have to pedal in order to travel forwards. The pedals act as a type of accelerator. So you don't have an accelerator on the handlebars but you have to pedal. An
