The Brief A child escaped injury after a bison briefly chased them during a close encounter on a Yellowstone National Park boardwalk. A child narrowly avoided injury after a bison briefly gave chase during a close encounter at Yellowstone National Park, according to video recorded by a witness. Child and bison encounter at YellowstoneBig picture view:Footage captured by Brittany Peteler shows a bison walking near a boardwalk as visitors pass by. One of the children then begins to run, and the bison briefly chases after the child before the child reportedly reaches safety. Yellowstone National Park advises visitors to stay at least 25 yards away from bison and other large animals.