You should never corner a bear or any other wild animal. Make sure the bear has an escape route. You should never climb a tree or other structure to get away from a bear. Bears are good climbers. You should never leave food or garbage outside even if it is in plastic bags.
Bears have a keen sense of smell and can smell food even through a plastic bag.
Bears are creatures of habit. If you see a bear on a path one day, you are likely to see it in that place again. When Mr. Saba took these pictures, he was over 100 feet away from the bears. The camera has a telephoto lens that allows close up pictures of the bears without getting close to them. At the time that the bears were around the school, there were no students on the upper field or in the playground area.