It amuses me how territorial squirrels questing for food in the fall are. I was sitting around in a park, openly watching them and they started creeping toward me en masse. Not just one lunatic squirrel either. No there was a group of three or four who approached, stood up on their hind legs, fluffed their tails then laid the smackdown on me in squirrel chatter.
It was very "You wanna piece of this you pansy assed biped? Better watch yourself, yo. We buried the last three of your kind in the shallow ditch behind the bushes with the acorns..."