Harold Prince: It was just thrilling.  You knew right away.  My memory is that the only thing that ever got fiddled around with forever was “Somewhere,” which was a song, top of the second act, where Reri Grist, the opera singer, sat in the pit and sang — she wasn’t seen by the audience — and there was a whole big ballet between the Jets and the Sharks. And that just got fiddled with and fiddled with and fiddled with until finally we had to open, but it was quite thrilling.