BACK HATCH GLASS EXPLODED WHILE THE VEHICLE WAS STATIONARY (PARKED IN A PARKING LOG), AND THE DRIVER WAS CLOSING THE HATCH. BACK GLASS PORTION OF HATCH WAS BEING MANUALLY CLOSED AT A SLOW-MODERATE RATE, AND GLASS SUDDENLY SHATTERED WITHOUT WARNING. THERE WAS NO IMPACT TO THE GLASS, NOR ANY DISCERNIBLE REASON WHY THE GLASS SHOULD HAVE SUDDENLY SHATTERED. APPROXIMATELY 90% OF THE GLASS ENDED UP IN THE CAR OR ON THE PARKING LOT SURFACE, WITH ONLY ABOUT 10% OF THE GLASS REMAINING ATTACHED TO THE HATCH FRAME AND STRUTS.