Spontaneous rear windscreen smash

[Richard-390a0]

Didn't Fiat Cinquecento's suffer from this back in the day?. IIRC the ginger hag Robinson on Watchdog did a piece about it.

[hornmeister]

Happened spontaneously to a couple of my double glazed windows.
Toughened glass can just pop sometimes due to heat expansion & contraction at different rates to the frame. The clue is glass debris on the outside. A projectile would have pushed most of it through to the inside.

[swisstoni]

Happened to me. Sounded like someone had chucked a brick but nobody in sight and with car moving.
Seems to be a fairly common thing according to this thread.
Expected a Renault Vel Satis rear screen to be a long time coming but the glass replacement co. found one in a day or so.

[bstb3]

Saw the same thing happen on an old Vauxhall estate (Cavalier I think, maybe a Carlton) in the early 90's. Three lads walking back from school one day in winter, car goes past then 'pop', rear window all over the road. Driver stops, gets out and immediately (and perhaps understandably) comes after us for putting something through it. Luckily a plod had been the next car behind and backed us up that we hadn't done anything. He thought it could have been from hitting a pothole in the road (to be fair, there were a lot of them), but it could also have been the freezing weather.