This is a documentary about how humans keep orcas (killer whales) as pets to entertain at places such as SeaWorld. It is centered around one vicious attack by a killer whale named Tilikum, but actually takes us around the world as well as into the past. This is not the first attack on trainers, and if the movie is to be believed, probably not the last one, unless measures are being taken to prevent abuse of the killer whales. Abuse in this case, by the way, means basically using them as entertainment. Killer whales should be free. I admit it, these beasts scare the daylight out of me. Appare...