Beware the Greek bearing gifts,. And even more beware the departing GUEST: they come , as dogs return to their vomit.
And guestTam: i don't think zeugma or syllepsis come into the punctuation/grammar bit.Nigel Parsons was taking advantage of an unintended ambiguity (virtually unavoidable when non-professional writers try to type out stuff which is basically spoken-word without the inflections). Zeugma and/or syllepsis (not synonymous) don't come into bad punctuation and bad grammar. They would come into bad punctuation and baaaad music.(hope that works typed).