A Siberian tiger at the San Francisco Zoo leaps a 12-foot high wall and mauls three visitors who had been tormenting her, killing one. A circus elephant tramples and gores a sadistic trainer, who had repeatedly fed her lit cigarettes. A pair of orangutans at the San Diego Zoo steal a crowbar and screwdriver and break-out of their enclosure. An orca at Sea World snatches his trainer into the pool and holds her underwater until she drowns. What's...