November 22, 2018 01:13 PM
Ryan Cowley went on a hike on Antelope Island near Salt Lake City on Sunday morning with his German Shepard, Kira.
But he soon noticed he was being followed by a herd of bison.
"You could smell 'em, you could hear 'em. They're making this low grunting thing and coming close," he said.
Cowley noticed their tails were raised, a sign of aggression, and climbed a tree for safety.
He eventually called 911 and a park ranger came to his rescue.
Watch the video box for the full story.
Updated: November 22, 2018 01:13 PM
Created: November 20, 2018 04:57 PM
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