The glass roof suddenly exploded while driving, there was a no visible damage on the glass as the sunshade was open and I inspect the glass for any cracks or chips, there were no cracks or chips. The outside temperature was 35 degrees, time as approximately 9:30 PM on a major highway with a smooth surface, and light traffic. The explosion did not occur while going under an overpass, there was no sound of any pebbles being pinged against the car, again traffic was light. Glass was not laminated as it is in a windshield, glass chips flew inside the vehicle which is very dangerous.