Playing in the KO rounds of the Junior World Championships, you end up in 6♥ on an uncontested auction. After the lead of a low trump, you draw two more rounds (there are hands where, double-dummy, this is wrong, but I think all sensible single-dummy lines start this way). East discards a low spade and a low club.
Maybe this means he doesn't have the ♣K, maybe it means he has the ♦K, or maybe it means he is trying to double-cross you. Ignoring the fact that 90% of the readers of this article have a wire, what would you do?
Plus... it's free!