However, when the grizzly overtakes you, as it most assuredly will, you should fall to the ground and play dead. A grizzly may chew on a limp form for a minute or two but generally will lose interest and shuffle off. With black bears, however, playing dead is futile, since they will continue chewing on you until you are considerably past caring. It is also foolish to climb a tree because black bears are adroit climbers and, as Herrero dryly notes, you will simply end up fighting the bear in a tree.