A heart-pounding scene was captured on a rural highway when a grizzly bear and her two cubs charged a man loading his car on the snowy shoulder. The video captures the man diving into his station wagon's trunk and slamming the hatch just as the massive predator reaches him. The bear proceeds to launch a ferocious attack on the vehicle, shattering the rear glass and rocking the car with immense power before the man manages to pull away and drive to safety. Wildlife officials urge the public to re