I took delivery of Model S 75D on Friday, September 9. On Tuesday this week somebody came to my office to inform me that my car had moved to the middle of the parking lot blocking the exit. Of course I quickly went to the car and parked it properly. From Tesla service I found that my Phone App had initiated the Summon command. I have no idea how it happened. My phone is a Samsung Galaxy 7Edge. In a way it is similar to Butt Calling by the phone. But it can be dangerous if the car blocks the traffic.