Jason Hribal is a historian of the Animal kingdom and his works include The Cry of Nature: an Appeal for Mercy on Behalf of Persecuted Animals and Fear of the Animal Planet: The Hidden History of Animal Resistance. Animal Activist. 
 

"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 steals 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 going on here? Are these mere accidents or simply cases of animals acting on instinct?"

— Fear of the Animal Planet: The Hidden History of Animal Resistance