I was driving on a road that the car has been on hundreds of times. Flat, straight, dry road with no other cars around. The car all of a sudden braked very hard and the "BRAKE" light started flashing and beeping for about 3-4 seconds and then went off and then the brake fully released. It was like hitting an invisible wall and fighting to maintain control of the car at the same time. It came out of nowhere and was so shocking. There was nothing around me and no reason for the AEB system to be used. I can't tell you if my foot was pressing on the gas or had lifted to maintain speed. I do know that my foot was on or lifted above the gas pedal and nowhere near the brake. I am shocked it didn't cause an accident but I am guessing that is because I held tight to the steering wheel and possibly because there were no other cars around. I have severe whiplash, a major headache, backache and am very scared driving the car should it happen again. I have not gone to receive medical treatment yet but it is highly likely that I will need it. I will be contacting the dealership as well to discuss.