My car did a Phantom break while I was driving on President George bush Turnpike E at the Dallas North tollway exit . I was taking the exit with in the speed limit of 40 miles per hour and was keeping the distance from the car in front. Suddenly the car did an automatic break and car slow down significantly. I got hit from behind and had damage to the bumper and trunk. Emergency break feature went out and an alert came. It is very concerning that the car stops in the middle of road by itself and being hit from behind. I would like an answer from Tesla. I have the dash cam footage of the accident