Hollywood has turned the special effect into a birthright for a generation of movie-goers. “How did they do that?” is no longer a question you hear in the multiplex. In the theatre it’s another thing entirely. Whatever the reception for the show in its entirety, the musical version of The Lord of the Rings did contain one remarkable illusion in which Bilbo Baggins vanished before the audience’s eyes. Even Derren Brown had no idea how it was achieved. The architect of that effect, and countless others in a long career in the theatre, was Paul Kieve.