Barrie Gilbert was walking fast on a treeless, 9,200 foot ridge in Yellowstone National Park, seeking a high perch where he could watch for bears with his binoculars. Suddenly, a bear appeared, rising from a day bed.
Gilbert ran, but the bear was on him fast, crunching its teeth into the back of his head, tearing the scalp from his skull and mauling his back. Then Gilbert rolled over and tried to fight. The bear tore off much of the left side of his face, including an eye.