2017 Chevy Volt...

Car is parked all day in an underground parking garage. After work I get in and close the door and hear a noise similar to ice crumbling on the rear window. I look back and see that my rear window has shattered. It looks like the glass is pushed outwards like the pressure of closing the door caused it to bubble out and pop.

Surely, a car's windows should be able to withstand that air pressure.

Any ideas on what would cause this?

[![enter image description here](https://i.stack.imgur.com/fFVSa.jpg)](https://i.stack.imgur.com/fFVSa.jpg)
[![enter image description here](https://i.stack.imgur.com/V1UHu.jpg)](https://i.stack.imgur.com/V1UHu.jpg)