That's just one of the great performance of the Timberwolves and the reason why they are on the top seed right now. We've seen a lot of crazy comebacks from a lot of different teams most frequently this season, this is just an indication that there are actually no leads are safe until the game concluded. Just most recently Dean Wade made a crazy fourth quarter to come back from a 20+ pts deficit in the 4th and win the game. That was just a few games after LeBron took over the 4th quarter to beat the Clippers in another comeback win.
These are all because the game of basketball today are more fast paced and everyone can shoot 3s more efficiently than before. A 20+ pts lead even in the 4th quarter isn't really safe nowadays. It will only take 1 player in the zone and extra effort on the defensive end can make a comeback win.
Right, we've seen many teams comeback from a 20+ deficit and win the game, so this is just one example. I do agree that they really play good defense on Clippers, and they didn't allow them to score at will. ANT limited Paul George and that was the story of the game. I think ANT really improved a lot this season, he was shifty in this game and George can't keep up with all his moves. He even had one drive going to his left and banking it with his left hand.
And we can't still get over him blocking that shot by Aaron Nesmith.
So they are holding off their position while waiting for Towns to make a comeback in the playoffs.