There were once millions of bison roaming freely across North America ... that form stampedes when running from a predator, American bison stampede when they perceive a threat.

On Monday, photographer Jeff Vanuga shared an image showing the aftermath of a bison stampede that caused panic among tourists who had been away from their vehicles observing a wolf kill.

This article originally appeared on For The Win: Yellowstone bison stampede toward snow coach in thrilling encounter ...

To their relief, the bison navigated around the vehicle without incident. On Monday, photographer Jeff Vanuga shared an image showing the aftermath of a bison stampede that caused panic among tourists ...