[rsln-s]

tl;dr: "Funkhouser sat in the rear seat, and Fisher sat in the driver seat on top of a buckled seat belt. <... > Fisher engaged Autopilot while the car was in motion on the track, then set the speed dial (on the right spoke of the steering wheel) to 0, which brought the car to a complete stop. Fisher next placed a small, weighted chain on the steering wheel, to simulate the weight of a driver’s hand, and slid over into the front passenger seat. Using the same steering wheel dial, Fisher reached over and was able to accelerate the vehicle from a full stop. He stopped the vehicle by dialing the speed back down to zero."