I own a 2003 Ford explorer sport. In 2008 my back window on the left side of my car exploded while I was on the highway. It was summer time and I just assumed that possibly a rock hit it. Today in 2010 my back window imploded. It was 32 degrees out, I scraped the ice off the back of the car and turned on the back window defrost. Then while I was at a stop light it just imploded. I wasn't running the back windshield wiper or using any fluid. It just imploded. There must be a defect in the windows. Other than the window problem my explorer is 7 years old and I have not had any other problems. It runs great.

 

a little too much bass perhaps?

 

There was a problem years back with windshields cracking and that was due to a defect that allowed metal from the vehicle around the windshield contacting the glass on particular turns when everything flexed.
Maybe someone can come up with another possible cause.

Nobody singing those really high notes are they?

 

Any rust that is present under or next to the glass mounting area will put stress on the glass.