WE WERE DRIVING OUR 2015 DODGE DURANGO AND WE CAME TO A STOP SIGN. WHEN WE PULLED AWAY FROM THE STOP SIGN AND THE VEHICLE WAS IN MOTION THE SAFETY ASSIST HEADREST ON THE PASSENGER SIDE FIRED OFF WITHOUT WARNING STRIKING ME IN THE BACK OF THE HEAD. I ENDED UP IN THE ER AND GETTING A CT SCAN AND WAS DIAGNOSED WITH A CONCUSSION.