I AM CONCERNED THAT THE DESIGN OF THE HEADREST IS NOT SAFE. I WAS IN AN ACCIDENT RECENTLY WHERE I WAS SIMPLY REAR ENDED. I HAVE A FAIRLY SERIOUS CONCUSSION THAT I HAVE HAD FOR NEARLY FOUR WEEKS. I BELIEVE THAT I GOT THE CONCUSSION BECAUSE MY HEAD HIT THE VISOR AND THEN THE BOTTOM EDGE, THAT JARTS OUT, ON THE HEAD REST.