"Blackfish," the horrifying tell-all documentary that SeaWorld doesn’t want you to see was written, directed and produced by a mild-mannered, yet persistent, California mother of two. Gabriela Cowperthwaite told Yahoo: "I am a documentary filmmaker and so I don’t let sleeping dogs lie." Or killer whales, like SeaWorld’s Tilikum a.k.a. Shamu. You know: that playful, shiny black-and-white predator that has inspired an armada of stuffed toys, appeared on countless T-shirts and doused busloads of cheering tourists.