JohnnySnook, that is a very interesting video. My opinion is the person in the video was in grave danger when the bear drove him into the water. I certainly would not seek water for safety against a bear.
This video also made me realize how an aggressive bear could drive a hiker deep into thick brush or swamp where they might never be found. Even if the bear did not kill, fear and hypothermia or drowning could do the rest. Could this be the explanation behind some missing person cases? Yes, I realize this is an unlikely occurrence.