WAS DRIVING 45MPH ON A STRAIGHT, FLAT ROAD, NO OTHER CARS AROUND. BRAKES SLAMMED ON AND THEN RELEASED. THERE WAS NOTHING IN FRONT OF ME OR BEHIND ME. I BELIEVE SOMETHING IS WRONG WITH THE COLLISION MITIGATION BRAKING SYSTEM. MY BACK AND NECK ARE VERY SORE. THERE WERE NO WARNINGS FROM THE SYSTEM.