A friend’s shower screen did that. Fortunately, no-one was in the shower at the time (otherwise they’d have been picking glass out of interesting places for months) and she had just finished cleaning it and had left the room. Awful to think what would have happened had it asploded while she was still cleaning it.

Glass isn’t a true solid, but a supercooled liquid. As a result, there’s often a great deal of internal stress in a big chunk of glass, and when you start rapidly expanding or contracting said glass chunk due to temperature changes, sometimes those internal stresses can get a bit exciting.

At least you had safety glass in place… on the other hand, if I recall correctly safety glass has even more internal stress than normal glass. That’s the reason it shatters into such itty-bitty pieces when it’s finally cracked.

Right. Sorry. You probably didn’t want to know any of that shite, did you?

Exactly. Glass repair men roaming the neighbourhood with stones, then telling everyone how normal it is when they come to fix it.