old glass and temperature? We had a station wagon at one time, and the car was in the carport, kind of cool under there. Dad pullled out the car and we had to wait for someone to come out. It was about 10 minutes, but when they got in the car and slammed the door.... the rear window exploded! I know it's meant to do that rather than shards of sharp pointy stuff, but still a shocker. Glad you're ok!