Galloping bison herd in Yellowstone has tourists running for cover

With a herd of bison galloping toward them in Yellowstone National Park, two tourists caught by surprise made a mad dash over a bridge in search of safety while another tourist captured the moment in video.

Kyleen Olson and her family were driving toward the bridge when they noticed the couple walking back over the bridge to their car. At the same time, they also noticed a cloud of dust rising from the trees. Suddenly, a herd of bison veered onto the roadway, forcing the couple to turn around and run for cover.

"They were nervous for sure, and jumped next to the bridge," Olson told USA Today/For The Win Outdoors.

In the video, you can see the couple taking cover at the end of the bridge, as the bison veer off the road.

"The bison wanted nothing to do with them, they just wanted to cross the bridge," Olson said. "I wasn't scared. My daughter was at first since the bison were running right toward our car. They ran right next to us up the hill. It was exciting and a once-in-a-lifetime experience."

Olson added, "The couple was just in the wrong place at the wrong time."