Wow. That's a first. Glad you were OK.

Have you told Honda? If not you need to ASAP.

 

Maybe not a first........

https://www.ridgelineownersclub.com/threads/moon-roof-shattered.238210/

https://www.ridgelineownersclub.com/threads/moonroof-sunroof-exploded.216708/page-2?post_id=3416377&nested_view=1&sortby=oldest#post-3416377

https://www.ridgelineownersclub.com/threads/moonroof-sunroof-exploded.216708/page-2

 

Sounds like we have a problem. You don't have a 5,000 watt stereo and 10 subs, right?

 

It happens. Has happened to glass forever.

I had glass shower doors shatter into thousands of tiny pieces. I'm in the living room and hear a Strange noise in the bathroom. It was the glass cracking. It stayed in the frame even until I tried to remove the doors.

I had a Ford C-Max and the back glass did the same. I remember a guy many years ago on a really hot day pulled under a shade tree. Front windshield just shattered.

 

It would be an odd angle for a bit of debris to break that sunroof, BUT, I have encountered rocks pinched out of the tires of semi trucks that seemingly bounced into me while I was several dozen yards behind the other vehicle..

 

Decades ago I chased a similar problem in a commercial building. It turns out that two big causative issues are 1) installation nicks at the edge of the glass and 2) large temperature gradients.

 

Glass is a funny product. I have seen rocks bounce of windshields, even coming out of a lawn mower and into a sliding glass door and nothing happened. I just leaned on the windshield years ago and it cracked. Another one way I came out to my car in the morning and the right side rear door window was shattered. All of the glass was on the driveway and none inside. It had been very hot the day before and the glass just exploded outward.

Pressure can also cause glass to explode. Were any windows open? You say the sunshade was opened but any windows. Was it windy?

 

Windows were cracked, AC was off. Temperature was around 70F at 7:00 AM.