This 26-year-old hacker can make a self-driving car, but can he take on Tesla?

George Hotz, the latest Silicon Valley startup founder to get a multimillion-dollar check from venture capitalists, went for a ride in a Rolls-Royce around San Francisco on Monday. At 26, Hotz thinks he could teach the legendary vehicle a few tricks. Braking should be smoother, he says. The vehicle should run each time as if the best limo driver in the world was behind the wheel. "You don't want the champagne to spill," Hotz says.