With that said, Game 4 is to blame if we lose Game 6 and eventually Game 7. To me, they didn't give their best effort in that game, and I'm not talking about the whole game, but the last possession in particular.
I know people say the refs aren't going to make that call in that situation, but I've replayed that play 8 or so times, and Nelson fouled Pierce, no 2 ways about it.
Pierce lost control, but then regained control and dribbled to the floor before Nelson barreled into his arm. If that's not in the last 2 minutes, it's a clear foul 10 times out of 10.