This is unheard of. In the long history of the NBA, no team led by at least ten points at the start of the last period of a Finals game had won by more than ten units. The Boston Celtics, on the floor of the Warriors, won Thursday night the first set by 12 points (120-108) following counting as much behind (92-80) following three quarters. Worse, they had 15 following 34 minutes of play and this gap might even have increased to 18 if Stephen Curry had succeeded in this three-point stepback.