Reports describe an incident at Yellowstone National Park in which an elderly man is reportedly injured after a bison charges through a campground. Accounts say the man was walking with his grandson on Friday evening when they encountered the animal. Multiple reports describe a sudden confrontation followed by the bison charging, with the man reportedly thrown or propelled several feet during the encounter. The accounts characterize the moment as dangerous and highlight the risk of remaining too close to wildlife in the park. The reports do not indicate whether the bison was deliberately approached or whether there was any prior warning before the charge. Details about the man’s injuries and any official investigation are not included in the supplied summaries. All accounts consistently frame the event as occurring in a Yellowstone campground, involving a bison charge that results in harm to an older visitor while he is with a child. The story underscores the park’s guidance to keep distance from wild animals, though specific citations are not included in the provided text.