Some national parks in America have bison, some of those bison are ornery, some of those ornery bison will charge visitors to the parks, visitors who are charged are naturally slower than bison, and so some of those slower-than-bison visitors get gored. The National Park Service warns visitors about bison attacks. (A recent injury involved a forty-three-year-old Mississippi woman who turned her back on a bison, apparently to take a selfie with the animal. She was treated and released with, fortunately, minor injuries.)
When bison attack, who should be held responsible?