It was a smart (likely accidental) strategy for Carolina. All series they passed the puck around to get the perfect shot. He would always cheat for the extra pass. Now, they're down 2-0 and they shoot everything at the net while he's cheating for the pass so he gets beat twice. In OT, he anticipates them shooting everything at the net and they once again cheat for the pass.
They got him thinking because they switched their gameplan up due to chasing the game and series. Carolina needs to do both, sometimes take bad shots at the net and sometimes look for the play so the goalie can't anticipate which one you're going to do.