This summer when it opened in Chicago for tryouts, “Movin Out”, the Twyla Tharp/Billy Joel collaboration got packets of bad reviews. Now it’s a star on Broadway. What happened? “It had been a long time since a show considered doomed on the road was able to turn itself around so quickly and completely. Faced with similar crises, countless producers have summoned teams of show doctors, ordered emergency set changes, delayed their Broadway openings and ruthlessly dismissed choreographers, directors, and even stars. But in this case the rescue job rested with one person, Twyla Tharp.”