on and on i went , down the line to the left , why to the left i do not know , except it was my path , and each time i pulled back the veil , i leapt forward with ferocious speed , snaring the arm if it should rise , but sometimes gaining such momentum on it that it had no time to rise , and chopping off the head so fast that i became sloppy and my blows ugly , and i smashed the jawbones of my foes , and even their shoulder bones , but i killed them .