Thanks for all that extra information.

I guess glass doesn't actually "explode" then, it just shatters, but sounds like an explosion when it happens?

Pyrex used to be made in Australia and other countries. Products called "Pyrex" are also made in China.
e.g.
Pyrex Glass Baking Dish
http://cnjiaotong.en.made-in-china.c...king-Dish.html

Not all Pyrex is made in the USA.

What are Agee Pyrex & Crown Pyrex? Who made Australian Pyrex?
http://www.corellecorner.com/company...australia.html
What are Agee Pyrex & Crown Pyrex? Who made Australian Pyrex?