Dolphins are some of the smartest animals on earth, but if tormented, they will fight back.
(02:56)An animal trainer is killed by his elephant during a performance; why did it attack?
(02:32)An expert hunter in Tanzania turns into the hunted when a buffalo suddenly attacks.
(01:48)A troop of chimps escape their locked compound and attack a pair of tourists and kill their driver.
(02:59)