and of course, as a non-expert who don't know much I would add that maybe, somehow, possibly, in case he had cut off the second (operating) engine before touching down (as he was about 30 feet in the air when the engine failure occured), the 20 to 30 knots N-NW wind may have also possible somehow helped to push him out of the rwy.
But there again, I am only a private pilot and no nothin'