While driving approximately 50 mph, vehicle sunroof glass spontaneously exploded spraying shards of glass in the vehicle. The vehicle was not driven under any bridges, and there were no vehicles within a reasonable distance ahead or behind my vehicle that could have thrown something at the sunroof causing it to break. My safety was put at risk as sharp pieces of glass were sprayed on me, into my clothing, and into the empty child safety seats in the middle row. Upon inspection, the Honda service department denies that this break happened spontaneously and the dealer states that they were able to identify a point of impact on the sunroof as to what caused the glass to break. A photo of said impact has been requested from the service department, but as of this writing has not yet been received. There were not any previous known damages to the sunroof, and there were no warning signs prior to the glass shattering.