I have heard a lot of stories recently where heat resistant cookware shattered. Most of them seem to be the fault of the user. For example if they put an oven hot bowl into cold water, or if they try to use a Pyrex glass bowl which has a crack or chip in it. And the glass does just disintegrate into a bunch of small pieces, rather than exploding.
But I still find it a bit unnerving and I am very careful about using this kind of cookware in my oven.