Rin was absolutely oblivious that Seth was unconscious at this point and her attack continued as planned. 
As it turned out, the two shadow clones that kept flanking Seth were mere clones without any substance which also explained why they constantly rushed him with a kunai instead of using more powerful techniques. The clones rushing with their Kunais simply passed through Seth’s body and vanished soon after. That was the point where it became clear to what extent Rin had conserved her chakra. Seth fell right into it using his rock biter jutsu and rock pillars to avoid attacks that couldn’t even hurt him. Rin knew the balance shifted, as Seth wasted a lot of chakra in the process while Rin’s had been barely drained at that point, but she still wasn’t aware that Seth was on his last leg.

As Rin was about to strike she disappeared in a puff of smoke, as did the shuriken she had thrown. It became obvious that what Seth believed to be the real Rin was a mere shadow clone as well. However, the disappearance of that clone was not Rin’s doing. She had underestimated the amount of chakra control she required for her next attack.

From the cover of trees behind Seth and the pond he was standing in front, a number of wind chakra infused kunais with explosive tags emerged hitting the water. The wind chakra pushed the water to the side as they hit the soil underneath, ensuring that the explosive tags remained dry. The following explosions created a large wall of water and out of it emerged the real Rin at high speeds approaching Seth’s back. There was no escape from her technique at this range. “Two palms! Four palms! Eight palms! Si-“ she suddenly stopped herself there as Seth flew forward from the hits he had already received. Normally the muscles in the body tense up when hit by this technique as it was a combination of the Eight Trigrams thirty-two palms and a paralysis jutsu using lightning style which both close off tenketsu and disrupt signals from the brain to the muscles. But that was not the case with Seth and Rin could see that with her byakugan. She knew something was wrong but she didn’t know what to make of the situation. Instinctively her mind assessed that this was some form of trap and she scanned the surrounding area with the byakugan while maintaining a gentle fist posture, ready to defend herself in case of an attack.