I came across this hand very recently and was wondering how people would rule.
The hand occurred in a late stage of a KO event and you don't have to like the auction: West opened 1♥, East responded 2♣ and South doubled. The next four calls were 2♥-2♠-3♥-4♠-5♥, at which point North put an end to proceedings with a double.
North led ♦7, low from dummy, Ace from South. Two rounds of spades followed: declarer ruffed the second and finessed ♣Q. South returned a diamond which ran to dummy's Jack. Declarer now played a small trump from dummy and, when South played low, thought for a long time, apparently removing the Ace, putting it back and removing it again. North eventually said "It doesn't make any difference". Declarer now played the ace, cashed ♦K, ruffed his last diamond with dummy's small heart, North discarding a spade. The ♥Q was now played: North won with the King, exited with a club and scored his last trump on an over-ruff; three down and 500 to N-S.
Obviously, had declarer cashed dummy's ♣A before playing ♥Q, he would have escaped for two down rather than three down. Declarer's position was that the comment "It doesn't make any difference" was an indication that trumps were originally 2-2 so it didn't matter what he did. Note in passing that North did well to discard a spade rather than his second club when the fourth round of diamonds was played.
How do you rule?
As a subsidiary question, where and when do you think that the hand occurred?
Benefits include:
Plus... it's free!