A Koala bear walks into a bar, sits down and orders a sandwich and the bartender brings him a sandwich The Koala eats the sandwich and gets up, spins around, pulls a pistol out of his pouch, shoots the piano player, an proceeds to walk out of the bar. The bartender, in shock, shouts to the Koala, "hey who do you think you are, you ate my sandwich and shot my piano player, and just where do you think your going! The Koala replies, "Hey I'm a Koala. Look it up." The frustrated bartender pulls out a dictionary from behind the bar and looks up Koala: "n. a marsupial that eats shoots and leaves."
Koalas are bigger and nastier than the typically displayed is tourism photos. One of there defense techniques is urination and they have rather sharp claws. Its like any wild animal upset will defend it self. Try picking up a Tasmanian Devil which is about the size of a domestic cat but regularly brings down prey 3 times its size.