Playing a district playoff match for the Swedish 'GNT' (grand national teams), my teammate, Krister Ahlesved, got to 6D on the resources below (I don't want to know how ;). As my opponents were satisfied with a mere game, a lot of imps were riding on the result.
This called for a favorable layout after a heart was led to the ace. 3 rounds of clubs (discarding a H on the ace of spades along the way) saw LHO ruff in with the J of diamonds as declarer discarded the obvious H loser from dummy. When a small trump was returned, the only successful opposing distribution was JTx vs xx, so Krister ducked to the queen, cross-ruffed, setting up the long club (ruffing with the ace of trumps). The king collected the remaining trumps and he was left with the 7 of D and the 8 of C.
The 7 of D is internationally known as the 'beer card'; if you win the last trick with it, partner has to buy you a beer later. In Sweden, the 8 of C has a similar long historical tradition.
So, what would it be? Should the last trick in the winning slam be completed with the 'national' card or the 'international' card?
The mental anguish was too much. He claimed.