The farcical disaster flick "Sharknado" made its debut on the Syfy channel Thursday night, and even if not critically acclaimed, the film was a big hit on Twitter. #Sharknado became a top trending topic, garnering the production an usual amount of attention for a TV movie. Not surprisingly, most tweets had fun with the movie's premise -- a school of sharks is swept up into a giant storm that descends on Los Angeles.

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