There was the case of the woman who was treed by a 200 lb undernourished adolescent grizzly outside Canmore a few years ago. It is believed she climbed a tree to get away from it but small grizzlies can also climb. She either fell or was pulled out of the tree by the bear. The fall killed her, the bear did not. When found by authorities, the bear was chewing on her dead body - whether it was for feeding or biting her just out of curiosity isn't known.