The idea of a hoax had first come to me during a performance of the play. If anyone is shocked by this, all I can say is that I know of no actor who is so pure onstage that he thinks only what his character thinks. If he did, he would presumably become the character: a form of madness. This may of course be what happens to Hamlet—he puts on an antic disposition, and gets stuck in it. Something rather like this seems to have happened once to an actor who was playing the Prince. Daniel Day-Lewis, as was widely reported in the press at the time, suffered a breakdown in the middle of the performance, and the explanation most commonly offered was that he came to believe that the actor playing opposite him as the Ghost of his father was his own father, who had been dead many years; whereupon he abruptly left the stage, never to return, and never to play the role again.
This was not a warning that I am ever likely to forget; I was the Ghost.
Acting is mostly a twin-track mental activity. In one track runs the role, requiring thoughts ranging from, say, gentle amusement to towering rage. Then there is the second track, which monitors the performance: executing the right moves, body language, and voice level; taking note of audience reaction and keeping an eye on fellow actors; coping with emergencies such as a missing prop or a faulty lighting cue. These two tracks run parallel, night by night. If one should go wrong, then it is likely that the other will misbehave too.
I had a painful illustration of this just before we finished our run in the West End. After nearly three hundred performances I was tired, and I suppose that the sight of the finishing tape made me relax. At some point I failed to make one of my moves. Sara told me later that a mobile phone had just gone off in the audience. A second or two later I was standing on the stage not knowing where I was or what I had to say. A black hole had opened up around me. Niels Bohr had vanished from Track One, and an alarmed David Burke on Track Two had to take a prompt from the equally alarmed prompter. The move I had failed to make was tied to the thought and the words; when one went, they all three went.
The Copenhagen Papers: An Intrigue
Michael Frayn, David Burke