Note the sign. There were signs for almost every herd animal you could think of. Warning you about free-range cattle, deer, sheep, elk, reindeer, and lord knows what else.
However, at about the Utah/Wyoming border, I discovered some suicidal deer that were determined to kill me.
I slowed to a crawl, waiting for the deer to pass. Since they just stared at me, I assumed it was safe to continue. As I accelerated, the above occurred.
