Not sure if I have to mark spoilers for non-recent books, but there are some for Making Money in my question.
I've been re-reading my favorite Discworld books, generally out of order depending on which the local library has in at the moment. I'm on Thud right now, and I caught on a throwaway line near the beginning where Carrot is giving a rundown of recent events. He starts saying that there's been a burglary at the Royal- and Vimes cuts him off.
Perhaps it's because I had borrowed Making Money just before, but my brain made the connection. Is he talking about Moist breaking into the gold vault? It seems too perfect to be coincidence, especially in DW. I felt quite proud of my brilliant deduction until I looked up the dates, and Thud came out well before Making Money.
So, the question in my mind remains. Awesome foreshadowing for a plot yet unfinished (after all, Thud is after Going Postal, so the bank idea was around) or an interesting coincidence?