Spontaneous explosion of moon roof glass — I was driving about 70mph on the highway near my home, it was a windy/partially sunny day and for no reason my moon roof glass exploded, sounded like a small bomb and in the rear view mirror i could see a lot of debris coming down. I then drove to a location where I safely parked and took a picture of the broken moon roof glass. I did not hear or see anything that would have caused this — it was spontaneous. Occurred about 330pm.