In The Hitchhiker's Guide to the Galaxy, when Arthur and Ford are picked up by the Heart of Gold, they experience the effects of the Infinite Improbability drive, causing their surrounding to shift through several surreal and absurd iterations as the improbability factor spins down to 1:1.
During these iterations, the narration states that the void "spewed up a payment" which seems to actually be a pavement (or, I believe, a "sidewalk" to us Americans); the word "pavement" is used in the remaining narration.
Is this a misprint in my edition of the book (paperback with the "42 puzzle" on the cover)? Or was it supposed to be a subtle clue as to what Arthur and Ford were experiencing? Occam's razor suggests the former, but Adams's style might imply the latter. I would expect the word to continue changing in that case, however ("payment" -> "pavement" -> "pair of mints" -> etc.). Or, maybe because I would expect that, it makes more sense for it to change just the one time as it does in the novel.
I realize I am probably paving too much attention to one small detail but I wanted to know if anyone had any special insights into this.