Bison and Grizzly Confrontation

I was eating lunch at an overlook in Hayden Valley, Yellowstone National Park, when a grizzly bear suddenly appeared in the sage. I set the sandwich down and pulled out my gear. The grizzly was heading toward a bison herd so I decided to watch, not expecting this confrontation to occur. Filmed with a Canon 7D and 500 mm lens, Post processing in FCPX. Music by