621
xkcd #2922: Pub Trivia
(imgs.xkcd.com)
Alt text:
Bonus question: Where is London located? (a) The British Isles (b) Great Britain and Northern Ireland (c) The UK (d) Europe (or 'the EU') (e) Greater London
https://en.wikipedia.org/wiki/Instant_Replay_Game There were 37 seconds left when it was overturned--not post game.
32 seconds, actually. They must have paused the game timer during the four minute deliberation, drat! If we could find a single example of results being overturned outside of a game then that would satisfy the question.