Side/rear Glass problems of the 2010 Honda Accord

The moonroof glass on my 2010 Honda Accord spontaneously exploded while I was driving down the freeway. Nothing hit it, there was no wind or unusual condition of any kind. One moment, normal driving, then a sound like a big firecracker exploding in the car, then I looked up and about one quarter of the glass was gone out of the center, the rest was shattered into a million pieces but still hanging in place. More glass has broken loose and fallen down and the hole grown bigger over the past day. Though most of the glass broke into safety glass-like chunks, there were some fine slivers in the passenger area that were sharp and difficult to clean up.

I rented this 2010 Honda Accord from enterprise (dundalk, MD office) when my car was sent to repair. I noticed that this car was making a lot of noises while driving. Then on Feb 7, 2012 around 6:40am, I just finished work and headed home. I had all the car windows closed. As soon as I entered highway I-95 north (exit #43 in maryland), I noticed there was strange noises. It sounded like some stones jumping inside the door. The strange noises didn't go away and I heard a big explosion sound several minutes later. It was very scary. I thought I was going to lose control of the car. There were cars all around my car. I was afraid of hitting other cars. My first reaction was flat tire or gunfire. However, I noticed the driver side glass was gone seconds later and the car was still drivable. The broken glasses was inside my car and inside the door. This is very scary experience as I have no such experience before and I have not heard similar cases around me. I believe the glass explosion was due to resonance.

We were driving on the highway when we started hearing a cracking noise coming from the sunroof. My boyfriend looked up to see the sunroof cracking. He quickly closed the sunroof cover just before the glass shattered. No construction vehicles or heavy equipment were in the vicinity. No rock or other projectile hit the car. I contacted my local dealer and left a message for the service manager. I contacted Honda customer service the next day and got a case number. I dropped my car off at the dealer the following morning with the understanding that the dealer's general manager would take a look at it. Before lunch, I got a call from the dealer that Honda denied my claim for a warranty repair, stating it was accidental damage. I contacted Honda and the regional care manager stated that it could have been caused by a small rock. I was told to go through insurance. I called my insurance. They agreed it was unlikely that it was accidental damage and would want to look at the vehicle to understand if they should try to get money back from Honda. I dropped my car off at the glass company. The company had to order the glass from Honda as it's not regular window glass carried by their vendors. We spoke to a few service writers and a service manager - none had ever seen anything like that. The glass company also said that they never saw anything like it. Sunroof glass is thick and tempered and should not shatter like it did.