Second, it was a clear 2-for-1 possession, and Harden kept dribbling without purpose, and killed all the time, then picked up the dribble at worst opportune time and gave it to Lin. With tight defense and cold hands, Lin couldn't do anything.
Then the unfortunate foul and 3 point lead.
On top of that, Harden was another ill-advised drive and bad pass. All the scrambling, and somehow Lin got the ball and gave it up to Parsons.
The dagger from Parsons really saved a disaster.