[GUS.K (Ivan)]

My wife did a bit of re arranging of some ornaments around the house yesterday. This morning, while standing in the dinning room with the sun beaming through a north facing window, we could smell smoke, and it was quite strong. We assumed it was coming from one of the neighbours slow combustion fires, until my daughter pointed to the dining room table, where there was some smoke rising from the table runner mat. A round bottom spherical chemistry flask full of water( used as a flower vase) had concentrated the sunlight into a point source onto the table mat and started to burn it. We couldn't believe what we just saw, we were just about to go outside into the yard for a while, it was a lucky catch, could have ended differently.