Ward 9, a new dance play by Gregory Victor and Matt Williams, is like “One Flew over the Cuckoo’s Nest” set to the music of Ludwig van Beethoven. The major difference in this institution is that its residents are celebrities who all went over the edge at one time – Van Gogh, Bobby Fischer, Sylvia Plath, Nijinsky, Vivian Leigh, Howard Hughes, and Ludwig himself. And of course there is a diabolical Nurse Ratched and her assistants.