Looks like Boozer is yawning. That's actually fitting, considering how easy it is for him to score with Yao guarding him. On the other hand, Yao's expression is a look of helplessness.
Yao's shaking his hand after the game and Boozer is still shouting "Foul!!" Sloan has really worked it into them.
Hahaha, good one, but a got a better one: Yao to the referee: "What, that's foul on me, he's the one yelling"
Aliens Flop Too Yao: I saw it, there is a little green octopus inside this guy! Boozer: oooooooaaaawwwwww