> Seconds later, we drove through an intersection as two V.R.U.s — a man walking a dog — entered the crosswalk. They were a safe distance away, but the dog started to strain against its leash in our direction. Alford and I knew that the pet wasn’t in peril because the leash would stop it. But all the Tesla saw was a dog about to jump in front of us, and it came to an abrupt stop. It was a good outcome, all things considered — no injuries to any life-form — but it was far from a seamless self-driving experience.