Not sure whether it is legal. The idea is not unique, Porsche also uses this idea in one of their concept cars: <a href="http:&#x2F;&#x2F;www.porsche.com&#x2F;microsite&#x2F;mission-e&#x2F;international.aspx#&#x2F;design" rel="nofollow">http:&#x2F;&#x2F;www.porsche.com&#x2F;microsite&#x2F;mission-e&#x2F;international.asp...</a>