Watch: Bison flings man 8 feet into air in dramatic attack at US Yellowstone National Park

 A man sustained serious injuries after a bull bison charged and flipped him nearly eight feet. The aggressive animal targeted the victim and his grandson while they were walking in Yellowstone. Bystanders shouted and rushed the bison, successfully driving it away from the injured man. Emergency responders transported the man for treatment, reporting significant hip and leg pain. A man sustained serious injuries after a bull bison charged and flipped him nearly eight feet. The aggressive animal targeted the victim and his grandson while they were walking in Yellowstone. Bystanders shouted and rushed the bison, successfully driving it away from the injured man. Emergency responders transported the man for treatment, reporting significant hip and leg pain.