A Montana resident said her heart was “racing” after she encountered a herd of bison while driving in Yellowstone National Park in Wyoming recently.Cindy Shaffer, who regularly films footage in Yellowstone, captured the moment she came across the herd while driving on a snowy road on January 10.“Oh my God, there’s hundreds of them. This is amazing,” she can be heard saying in the video.“Pretty cool but a little scary,” she says, as the bison surround her car. Credit: Cindy Shaffer via Storyful