Well, a one in a million event occurred today. I have a beautiful 2013 SEL with a Panoramic sunroof. I have racks and cross bars on the vehicle as well. Today, while driving on I-5 outside Seattle and traveling 65 mph, a semi kicked a rock up in my path. The rock reflected upward over the windshield and impacted the cross bars on my rack. The deflection of the impact sent the rock downward causing the giant sunroof to literally explode. The sound was so loud I still have a headache 4 hours after the event. While some glass entered the vehicle, the majority of the glass maintained shape but was too unstable. It required pulling over at the first exit. All I can say is, my passenger and I were unharmed. I would like to suggest that no matter what type of roof rack or vehicle you may own, If your car has a oversized sunroof, please consider only using cross bars when carrying a upper load. I can assure you, if you have the same event, you will likely crash as a result. It is a absolutely shocking experience. Love my Edge anyway........ DRIVE SAFE