My RZ's rear window just spontaneously exploded while I was driving! No impact, just a loud boom and shattered glass everywhere. I'm in shock and Lexus is giving me the runaround. They're acting like this has never happened before, but I've found tons of reports online about similar issues with Lexus and other car models. I'm terrified to drive my car again. Anyone with teh same experience? Any advice on how to handle this with Lexus?