Bison kill and injure far more visitors to Yellowstone than do bears. Bison incidents are usually caused by the very think you saw: getting too close on purpose. With that said, several years ago a couple of workers were walking home on a trail one evening from their shifts at a restaurant when they came around a corner and startled a bison. Both were seriously injured. One may have died.


Passed close to several of them while riding in Wind Cave N.P. and Custer S.P. in South Dakota. Made me a little nervous.