Even in the things that look most frivolous there has to be the threat of something quite painful to make the comedy work. I suppose the play of mine that's best know is NOISES OFF, which everyone thinks is a simple farce about actors making fools of themselves. But I think it makes people laugh because everyone is terrified inside themselves of having some kind of breakdown, of being unable to go on. When people laugh at that play, they're laughing at a surrogate version of the disaster which might occur to them.