Imagine what you would do in this situation. You're a deer (I realize that's a reach) and you're being chased by a coyote. What do you do? If you're in Yellowstone National Park, you hide in a nearby bison herd which is exactly what just happened as a new video shows.
Getting a big buck is a goal that most deer hunters strive for. When that opportunity comes it is incredibly exciting. But sometimes what you saw in the scope and what you walk up to are two very different things.