You just never know what might happen at the Sundance Film Festival, and picking the indie flicks that will later have a chance to captivate the world (or at least the U.S.) has become a cottage industry among critics. Last year’s surprise smash, Little Miss Sunshine, was a textbook case of an indie achieving wide success, but few saw it coming. “It becomes more apparent every year that William Goldman’s great rule of studio filmmaking applies to the independent world as well: Nobody knows anything.”