2015 LEXUS NX Visibilitywiper Problems

WAS ENTERING HIGHWAY AND REACHED SPEEDS OF ABOUT 70MPH WHEN ALL OF A SUDDEN THE SUNROOF EXPLODED AND SHATTERED. I IMMEDIATELY CONTACTED LEXUS AS I KNEW NOTHING COULD POSSIBLY HIT MY CAR AT THOSE SPEEDS AND NOT COME FLYING THROUGH THE ROOF AND DAMAGE THE FRAME AND OTHER MOVING PARTS. THE ONLY THING THAT SAVED ME WAS THAT I HAD THE INTERIOR SLIDE HATCH HALFWAY CLOSED SO GLASS DIDN'T ENTER THE VEHICLE. I IMMEDIATELY SHUT IT AND DROVE TO THE DEALERSHIP. THE AGENT WHO LOOKED AT MY CAR REPORTED THAT THIS TYPE OF INCIDENT HAS HAPPENED IN THE PAST AND IT LOOKED REMOTELY SIMILAR. WE CHECKED FOR A ROCK LIKE STRUCTURE BY SHINING A LIGHT IN THE ROOF AREA AND NOTHING WAS FOUND. I CONTACTED LEXUS EXECUTIVE OFFICE AND WHILE THEY WERE EXTREMELY HELPFUL, THE THEORY THAT SOMETHING HIT MY CAR WAS NOT SUPPORTED BY THE LAW OF PHYSICS OR...