In defense of the driver, I'm not sure what else they could have done. However, they ended up getting too close to a bison in Yellowstone National Park and now they'll have something to explain to the insurance adjuster.
It's likely you've heard by now that another tourist has been gored by a bison in Yellowstone. There's new video of the incident that shows this may have been a heroic effort that saved a child's life.
The first National Park in the United States to be dedicated celebrated a birthday to start the month of March. March 1st marked 150 years since the establishment of the most iconic of American National Parks: Yellowstone.