NHTSA Complaint #11464373 — 2013 LEXUS ES

The moonroof suddenly shattered (it sounded like an explosion) while I was driving on the freeway in 70 degree weather. Initially I had no idea what it was but realized subsequently that I was shedding glass shards behind me. There were no overpasses where someone could have dropped something, I did not see a rock or other projectile, and - when I parked the car - I found nothing that from outside seemed to have struck it and/or stayed behind in the cavity.