This is weird. Today about 1:00pm I was outside helping a friend move some stuff so, we stop and take a break and start talking about my car when all of a sudden the back window just blew! The alarm went off and the whole window was smashed. We were like 20 feet away and the car was by itself. Nothing touched it. I'm stomped; I've no idea why this happened. I'm thinking the heat but, today it's nothing special plus I've seen hotter days. Any ideas?