Sunroof exploded while driving on highway 175 heading towards nacogdoches tx. we heard a loud pop almost like a tire blowing out, we get out the rental car to check on the tires and found nothing. we got back in and started driving, when we heard a gush of wind. we looked up and noticed the car had a sunroof so we moved the cover back and glass started to fly into the car. nothing hit the glass it just exploded out of nowhere.