Johanna dodges that heave back--after all, Katniss has done such a good job fixing her nose, it would be a shame to see that work undone--but that means that she loses a bit of her force, too, and Kate--however thrown-off she is by that twisted arm--is too good to let that opportunity slip by. If she wasn't good, she'd be boring.

It's the heel-to-shin that catches, and Johanna stumbles back a step, still with her grip on Kate's arm. Fuck that, she's not going down like that, not so easy, and she rocks herself forward, bringing her other forearm flat against Kate's back and wrenching that grip on her arm, trying to drive her forward and get her on her knees.