This is great work by the Knicks. The Spurs defense wants Wemby out of the main action. Knicks want him in. Brunson glances to the right corner to make sure OG/KAT are in position. OG runs up to screen but the Knicks know Wemby will pre-switch. He clears. Now Wemby has to switch to KAT. The Knicks, by placing OG and KAT on the same side, guarantee Wemby in the action. Brunson does the rest.