What dream does the author share in Chapter Four of the book, The Writing Life?

Chapter Four is taken up entirely with a narrative of one of the author's dreams - specifically, a dream that her typewriter was erupting. While the dream can be seen as a metaphor for the creative process, the typewriter can be seen as a symbol of the source of that process - specifically, the initial image/impulse upon which the writing is based and/or the technical skill that enables the writer to follow the "line of words" emerging from that impulse to its conclusion.