What would you expect to happen when the two met midair at the rim? Probably not what happened Friday night.
Miller, showing some random hops, stuffed Favors at the rim in what may be the best block you're going to see this season. Not only was it a great block, but it was with his off hand too. The announcer's reaction says it all: "Wait, was that Andre Miller?"
Favors was probably asking the same thing.