Nick wrote:
About 20 minutes ago the inside pane glass of my patio door glass
spontaneously shattered with a huge bang. It is still gently crackling.
The door is 20 Years old. It is aluminium sliding and still opens ok, so
it cant have been stress from the frame.

Any ideas what happened.


I saw that happen to a car window once. The door had been left open and
no-one was near it and nothing was touching it. The window just shattered all
of a sudden.