It's amazing just how fast bears can run.
That being said, a video recently posted to Instagram out of Montana is really helping put that speed into perspective.
In the video, a mountain biker can be seen cruising downhill. Not too far behind, a black bear is giving chase.
It's unclear if the biker was aware of the bear that was hot on his heels. The video ends just as the biker and bear disappear out of sight.
Whatever you do... do not fall in this scenario!
Photo: Getty Images