Toyota's Executive Program Manager Sheldon Brown took to the Expand stage to discuss how the automaker developed its fully-electric RAV4 and what the future of driving looks like. After chatting with us in front of the crowd, Brown slipped backstage to dive a little deeper. Brown and Myriam discussed the Rav4 EV's development and aerodynamics, and how electric cars have evolved over the past decade or so. Check out the full video interview after the break. Follow all of Engadget's Expand coverage live from San Francisco