I really can't understand this SMB, they are totally brutal on every second half of every game. They are much stronger if they are suffering to take lead.
For this game, I think it's down to SMB's experience and the fatigue of TNT's main man (Jones). Their (TNT) rotation is limited and the isolation plays for Jones in the last minute was probably a wrong move also since he was clearly exhausted.
It's the experienced who allowed SMB to snatched this game and win from the back, that rally that they've done in the final quarter being paid, TNT stars are exhausted not Jones alone but also Castro and Rosario, while from the other side all SMB players inside have it's respective help to win this game and take the lead from this series.