Video: Massive Bison Attacks Tourist at Yellowstone National Park

A bull bison at Yellowstone National Park charged a 65-year-old man and his grandson, who were approximately 100 yards away. The animal chased the man through trees and flipped him eight feet into the air. According to family members speaking to NBC, the victim underwent surgery and remains in the hospital. The incident was captured on video by a photographer, as reported by Camila Bernal for TODAY, documenting the shocking attack on the visitor.