Green being suspended for game changed the momentum of the series for sure.
But the re-dedication of defense, and toughness by the Cavs during that 5th game, was obvious. The Cavs just decided, that if they were going down, they were going down swinging.
The defense by the Cavs guards was inspiring, even Irving was glued to Curry. Don't forget Shumpert is a tough, talented defender, and JR Smith also stepped up on the defensive end.
Somebody figured out if you make it hard on the guards on Golden State, they can be beat. If you have the defensive weapons that is.