He had a Glock 40. But just being charitable, there were a few things he could have done better. One, not worry about the camera right then. Two, backing away from it as you make small whimpering pleas. Three, when it was clearly on the stalk and within 20 feet, aim carefully and fire.
He was lucky,
David Paulides preaches it. Do NOT go into the forest unarmed. Especially Yosemite which is number one in north America in disappearances.