Once in a blue moon comes an artist that stands a venerable art form on its head, reinventing it, adding unsuspected richness to it, ultimately nudging it to the future. Such an artist is thirtysomething flamenco dancer Rocío Molina. Two years ago, South Florida audiences were thrilled when she set the Arsht Center ablaze with her spellbinding performance at Flamenco Festival Miami. Now comes an intimate documentary by Emilio Belmonte that follows her in concert through her native Spain as she prepares to unveil a new show at Paris’ vaunted Theatre de Chaillot. Impulso opens a window onto her world and eye-popping talent. It’s the next best thing to being there. A star is born indeed.