A jogger fought off and killed a mountain lion with his bare hands after the animal attacked him on a trail in the foothills of the Rocky Mountains.
The runner heard the wild cat behind him and, as he turned, it pounced and began savaging him, clawing and biting his face and arms.
He managed to fend it off with his forearms and then jumped on top of the animal, somehow managing to suffocate it.
The man, who has not been identified, suffered bites to his face, arms, legs and back, but he was still able to hike to hospital, where he was being treated for serious but non-life-threatening injuries.
The attack happened on the west ridge of Horsetooth Mountain, a park 100km north-west of Denver, Colorado.