Hervé Pacault made good use of his trumps on this deal from the second round of the Teams:

Board 4. Dealer West. Game All A K 6 A 6 5 4 A 10 5 3 8 7 2 Q J 10 3 Q J 9 3 K 10 8 7 K 8 2 Q 9 7 Q J 9 5 2 6 4 9 8 7 5 4 2 J 6 4 A K 10 3 West North East South Martens Riberol Miszewska Pacault Pass 1NT Pass 2 Dble 2 Pass 2 Pass 3 Pass 4 All Pass

Against South's Four Spades, West led Q. Pacault won and at once set about a dummy reversal. He played a heart to the ace and ruffed a heart, a trump to dummy and another heart ruff, a second trump to dummy, and ruffed the last heart. Then he took king of clubs and ruffed a club in dummy. East had to over-ruff to prevent declarer having ten tricks immediately. But now West had to lead a diamond. He actually led a low one. West's king was beaten and another diamond set up declarer's tenth trick. If East had switched to Q then South would have let it hold, end-playing East.