If you happen to drive through Yellowstone National Park at any point in your life, you need to know there is a certain lane designated to you by the bison. For them, it's the middle of the road. For you, it's the shoulder as one recent driver through the park found out.
If you're from Wyoming and/or have been to Yellowstone frequently, you will not be surprised by this. However, it is truly a sight to be driving in the park and realize you are suddenly surrounded by a million bison.