I swear, sometimes what I see, and I have seen it at least three times in this series, are anticipation fouls called. Like last game. Pau got fed the ball way under the Celtics basket with Rasheed behind him but not in a good position to stop him. Eddie F. Rush was behind Rasheed and was actually blocked from the play. All he could see was Rasheed's back.
So Pau goes up with it and Rasheed sticks his arm out in front of Pau and hits all ball and blocks the shot at about chest height. 95% of the time my guess is there is no way that shot gets blocked without there being a foul. I think Rush knows that and maybe blew thw whistle to call the foul not because his eyes saw a foul but because once Pau got the ball where he did and Rush saw where Rasheed was positioned, he figured if Pau didn't get the shot off it HAD to be a foul.
He called a foul because he anticipated that there had to be a foul if the shot didn't get up and off. But it wasn't a foul, replay clearly showed that. And replay clearly showed that Rush was out of position to see the block and that it was pretty evident that both Wallace's and Gasol's bodies were blocking him from seeing what transpired. But Rush called it anyway.
As I've said, I've seen this a few times in this series and I sometimes think the refs blow the whistle and called the foul because they anticipate a foul had to occur, even if they couldn't see whether one did or not.