Peter Fraser writes, "the drama developed as a succession of incidents which the audience could join or leave at any time, and much of the show was impromptu." This was elaborated by George Speaight, who explained that the plotline "is like a story compiled in a parlour game of Consequences ... the show should, indeed, not be regarded as a story at all but a succession of encounters." Robert Leach makes it clear that "the story is a conceptual entity, not a set text: the means of telling it, therefore, are always variable." Rosalind Crone asserts that the story needed to be episodic so that passersby on the street could easily join or leave the audience during a performance.