Sunroof explosion - saturday 1/13/18 evening 7:30 pm driving on open highway (hardy toll road in north of houston) to airport to pick up my family. clear skies, ~50f. while driving at 68mph heard a loud/deafening 'pop'. no other cars nearby, no overpasses nearby. the glass explosion of the sunroof was spontaneous and blew up and then fell. take a look at photo to show crest near center of glass, also the edges of the glass near body are now lower than body. showing upward motion to glass. sunscreen was closed and caught most of glass.