One shot does not decide a game. There are always circumstances, things that might have gone differently.
But one shot can spark a run and change the feeling of a game. All Game 5 Monday night the Lakers hung close. They would not go away. Kobe Bryant dropped 42. But you just had the feeling at some point the Thunder would go on a run and pull away.
Then Russell Westbrook happened. And after that shot, you knew the Thunder would advance.