Christina regained control of her legs and brought her right foot up fast, using the left to pivot, and aimed her instep at the weak point behind the knee joint. The man blocked her attack effortlessly, and countered by spinning on his back leg and driving the bottom of his heel into her shin. Christina gasped in pain and toppled to her knees. The last thing she felt was a blow to the back of her head, and then there was nothing.
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