[Spade] A Q 7 2
[Diamond] 10 9 7
A low club was led, and East's 10 was high. Belladonna studied for some time before letting the 10 of clubs hold, but when he did the defense was helpless. East tried to kill dummy's clubs by leading the ace of diamonds and forcing dummy's ruff, but this didn't help. South was able to draw trumps and his two remaining diamonds were high.
Commentator Reese pointed out that what Belladonna was thinking about—overtaking partner's 10 of clubs with the ace in order to lead a diamond—would have sparked the winning defense. Dummy would be forced to ruff. Declarer would then lead dummy's good jack of clubs, and East would have to cooperate in the defense by refusing to ruff. Otherwise, declarer could overruff and draw the remaining trumps, ending in dummy.
The free diamond discard would not be enough to help South. If he next drew trumps he would lose a diamond trick in the end. And if he tried to negotiate a diamond ruff, the need to lead clubs twice more from dummy, combined with the presence of the nine of spades in the West hand, would cost him a trump trick. What a great defense that would have been! But it isn't news when Belladonna makes such plays; it's news when he doesn't.