Broken Window

The "spider web" has its center at 3 oclock
Tempered glass doesn't break that easy.
Once on junk yard, I wanted to break one of those triangle windows on VW. Had half-axle handy and took me 3 or 4 swings -stronger and stronger to shatter it.
Tempered glass can stay together like that till you push it and then you have million small pieces.

3Lakes Steve wrote:
High today was 80, Mostly sunny

The interior temp can go way above 80 degrees. Also I see what looks like a curtain or something behind the window so that little void can get very hot.

I had one just like it. Broke on its own from the heat. Took it off at the hinge and brought it to a glass repair place and they fixed it for less than $100.00. Not really a big deal!!

If the mower did it there would be a telltale sign of a rock.

Likely one of the least expensive repairs you will make on your coach in the coming years! Sorry for your bad luck but get it fixed and move on.
This is, of course, my opinion and should be completely ignored if you disagree!

Something could have been thrown by the lawnmower. If it did happen that way, the kid certainly didn't do it on purpose.

I had a shower door at home break about a month ago, just shattered but it stayed mostly together. It happens.

Safe travels,
MM.

High today was 80, Mostly sunny

Yes, it can happen from Heat. Daughter had her pickup windshield do that about 2 weeks ago in Dallas. Hers was a brand new Truck. But it had been sitting in the sun about 3 hours.

You know that windows can do that and it is from heat. I had a shower door break into tiny little cubletes like that when no one was near it. and one summer afternoon I saw my daughters car window do that. At first I heard it, then the little cubelets started falling out into her car and on the ground. When we reported it to her insurance company they acted very disbelieving, but I saw it and several other people that were visiting saw it. Crazy.