Driving on a 25 mph residential street windshield went pop and a spider web of cracks appeared in the lower passenger side of the windshield and spread to the middle of the windshield. no sign of anything that hit it. outside temp is 90 degrees and running air conditioner.. no previous sign of chip or ding from rocks.. car only has 7500 miles on it and is garaged every day.. lots of comments on mazda forum about bad /thin windshields on cx 5s..