Old Man, the chimpanzee, was rescued from a lab at around the age of twelve and relocated to a zoo in Florida with three female chimpanzees. The human caretaker for the chimpanzees, Marc, built up Old Man’s trust by slowly approaching closer and closer when he brought them food. Eventually he was able to play with and even groom Old Man. One day while in the enclosure, Marc slipped and fell. This startled an infant, “who screamed, and his mother, her protective instinct aroused, at once leaped to attack Mark.” Soon the two other females joined in the attack. “And then Old Man charged to the rescue of this, his fi rst human friend in years. He dragged each of the highly roused females off Mark and hurled them away. Then he stayed, close by, keeping them at bay, while Marc slowly dragged himself to . . . safety.”1