In Greek mythology, Zeus and Callisto, his favorite girlfriend, were walking in the forest. Zeus saw his wife Hera coming towards him. In panic, Zeus transformed Callisto into a bear. Hera saw Zeus was all by himself, but knowing her husbands cheating ways, she told him to come to Olympus with her. Zeus hesitated but ultimately went with his wife. At that moment, Arcas, Callisto's son, was hunting in the forest. He saw a bear and shot it in it's heart. Suddenly the bear started transforming back into Callisto. Arcas, realizing what he has done, cried loudly. He became angry that Zeus had done this. Zeus came down from Olympus, hearing the poor boys' cry and wanting to keep Callisto a secret from Hera. Zeus changed Callisto back into a bear