Windshield problems of the 2007 Nissan Altima

I walked out of my house and my windshield was cracked on the passenger side. The crack begins at the passenger side molding of the window and spreads all the way to the middle of the window. About an hour before, there was nothing on my window. Since this occurred to present, I have seen about 3 other Nissan Altima's and one brand new Nissan maxima, with the same problem and the owners have also stated it cracked out of nowhere. I was also able to find several complaints about the same problem online.