I am the owner of a 2006 Mazda 5. Last night in the dark, while ON A HIGHWAY, my back windshield seemed to "explode". Tiny pieces of glass went everywhere in the far back section. There was a LOUD popping sound when it happened. We did not see if anything was dropped onto the car. Could the temperature of the heater have anything to do with this? Has this happened to anyone else????? PLEASE HELP....