The so-called "sharknado" is actually a tornado that hits the sea area where sharks are active, and rolls up the sea water and sharks there to other places. It is a bit like a frog rain, but what falls from the sky is a great white shark with a bloody mouth! The story of "Sharknado" is set in Los Angeles, starring Tara Reid and others. The film will premiere globally on Syfy Science Fiction Channel at 9 pm this Thursday.