The leader of that stone Samurai's team seemed to have received some kind of drug boost and speeded up towards him, unsheathing his katana, and cutting towards his back.
Eric was already on his top speed, and it was impossible for him to run away faster, furthermore, it was sudden and unexpected, so he could only try to make a big jump from his position.
Without lowering his speed, or stopping his run, he used every bit of strength contained in his body to his right foot and used it to make an instantaneous jump ahead.
That made him increase his velocity by a bit and managed to escape the critical attack from behind him partially, as the katana still connected to his back and managed to make a cut.
His clothes were cleanly cut in a line, that soon started to become a bit rosy, even though he was wearing a navy blue outfit.