The world of competitive Irish dancing gets the documentary treatment from director Sue Bourne, who uncovers the sweat and toil behind all the sparkly outfits and clickety-clack footwork. With a special eye for tweenage phenoms, Bourne explores the field's surprisingly global talent pool: a Sri Lankan-born Dutch teenager, a group of Russian enthusiasts, a California family that moved to the U.K. for their gifted son. They're all fascinating subjects or would be if Jig didn't dance around their personal stories in favor of overheated waiting-for-the-scores suspense. B

