Collision while using Summon feature on a Tesla. I was parked, rear end in, in a parking stall at work. A minivan was parked, front end in, in the stall adjacent to me. The two cars were facing opposite directions with the drivers side of each car next to each other. As I approached my car, from a distance of about 100ft, I used the Tesla app to summon my car to me. I pressed and held down the ‘Come to Me’ button and my car lights went on and the car began moving forward then made a sudden, unexpected sharp left turn before pulling out of the stall. The turn was too sharp and a collision was imminent. I let the button go on the app, but it was too late and my drivers side back door panel scraped the rear drivers side bumper of the minivan next to me. I got into the car, manually backed up and surveyed the damage. I thought it was minor, but I reported it to the minivan owner. Due to an estimate of damage in the several thousand dollar range, I filed a claim with my insurance company. They repaired the damage to the minivan. I deferred any repair to my own car because I thought it was minimal. No injuries occurred as the result of this collision. I did not mention the use of the Summon feature when I reported this collision to my insurance company. I simply mentioned that I hit the car next to me pulling out of a parking stall and that the fault was mine.