Crazy

I opened the curtains on our bedroom window this morning to find this amazing pattern- a shattered double glazed inner piece of glass. I thought at first we had some very left field creative spiders. Just hope it is still under guarantee. We have no idea how it happened as it is behind a chest Of drawers. Has this happened to anyone else ?
Had a really good pre New Year Spring clean this morning then spent the afternoon trying out a wheat free lasagne for tomorrow evening. It's a bit like moussaka so I hope our wheat intolerant friend likes it.