A Texan man's visit to an African chimp sanctuary becomes a deadly struggle when he and his guide are attacked by the colony's escaped alpha male; Idaho Zoo's 'Feast for the Beast' fundraiser takes a bloody turn when a 600-pound Siberian tiger breaks free and pursues one of the organisers; and, a police officer faces an angry bull when the animal escapes from a 'bloodless' Massachusetts bullfight and goes on a rampage.