During the winter of 2011, a man was driving his car to work on a highway with one lane in each direction. Suddenly and with no warning, large slabs of ice and snow from the roof of an oncoming tractor-trailer truck came crashing through his windshield causing him to lose control of his vehicle. The slabs of snow and ice that came through the windshield struck the driver in the mouth causing severe dental injuries including fractured teeth. Company policy required the truck driver to clean the snow and ice from the roof of the truck prior to taking it onto a public roadway. Security camera footage from the facility where the tractor-trailer truck was picked up that morning showed the truck exiting the facility with several inches of ice and snow on the roof.