A standard movie centered on the 2007-08 financial crisis could make anyone fall to sleep after the first sentence. Americans, while familiar with the woes of the crisis, may find a movie on economics boring. But “The Big Short” is different as it understands their resistance and functions on this principle. Despite its complex subject, “The Big Short” is riotously funny, delightfully clever and lighthearted; all of this occurs while doing justice to the subject matter. The film is co-written and directed by Adam McKay, known for “Anchorman” and “Talladega Nights.” It is an adaptation of the 2010 best-seller “The Big Short” by journalist Michael Lewis. Arrogant stock trader Jared Vannett, played by Ryan Gosling, narrates…