This is what happened in my kitchen tonight:
I was about to roast a chicken breast, and I had set the Pyrex baking dish on the oven to spray it with cooking spray. Admittedly, the oven was hot, but the baking dish was room temperature and is designed to withstand such heat. In fact, I did this exact same thing last night (and many other nights). I coated the dish with cooking spray and paused to grab a piece of cauliflower to munch on while the chicken finished browning – the dish sat on the oven for maybe one minute and then … POW! BAM! EXPLOSION!
The dish had quite literally exploded. As you can see from the picture, it didn’t just crack or break, the thing shattered and had some serious lateral movement. I will probably be afraid of Pyrex for the rest of my life.