Dwyane Wade was not new to the Euro step move. And the Euro step is not new to the NBA (have you seen Manu Ginobili?).
But this is the textbook application, with the guard attacking an almost stationary big man in the open court. And it spun Kevin Garnett around during a key sequence in Game 2 and made one of the best defenders in the game look the fool.
This also shows why the Celtics need to keep the Heat out of transition. But right now they need to do a lot of things differently.