Jane yelled orders to Charlie, got tired of the verbal interface, and pulled down the steering wheel. She got into a manual-assist mode, where a tug on Charlie’s steering wheel was the software equivalent of a tug on a horse’s reins. This was an excellent way to pursue a storm, if your horse was a smart machine a thousand times stronger and faster than you were. Excellent, that is, if your horse didn’t get its code hung between mode changes. And if you didn’t forget that you weren’t really driving a car at all, but instead, vaguely chairing a committee on the direction, speed, and tactics of the vehicle. It was certainly vastly safer than driving manually in the wake of a pair of tornadoes. But it was still a really good way to get killed.