Borussia Dortmund, arguably one of the most popular German football clubs outside of Germany, and Opel have worked together to create this weird little thing called the Rocks-E 09. They call it an SUM, which stands for Sustainable Urban Mobility, and anybody over the age of 15 can drive it (with an AM driver’s license … More BVB supporter? Borussia Dortmund and Opel have built a ‘car’ for you