It sounded like a gun went off inside the car. We were traveling about 60 mph on the interstate and after the initial shock I looked both behind me as well as to the side to see what may have caused the noise. To see if something had hit the car on top, we pulled back the sunroof visor a few inches, enough to see and hear that the sunroof had a large hole in it. After pulling off at the nearest exit and climbing out of the car we could see that the sunroof looked as if the had exploded upwards and outward. An irregular hole about 5" X 15" across was evident and the edges were arching upwards as if something has exploded inside the car. Safety glass fragments were on top of the sunroof and there were some on the visor inside. No glass had entered the car because the visor was closed at the time. We were not near any bridges at the time of the explosion, we saw no rocks. The temperature outside was 75-80 degrees and the air-conditioner was on inside the car. There is no evidence of anything hitting the car.

- Martinez, GA, USA