'Pure, Incomprehensible Perverseness': Rehearsing Romeo and Juliet at La Scala Ballet "How often has one sat at a first night at the opera or ballet, groaning at missed cues, horrors with costumes, disasters with lighting: one thinks they should surely have got it right by this time? And what if indeed it is human ineptitude that conspires?" Not to mention the cascading strikes The Arts Desk (London) 07/25/10