From the description, it sounds like the CG rotates around the nose of the 'plane rather than the other way round as per normal aircraft. Are Boeing using some sort of exotic matter to build the -300?
I imagine it's a case of inertial Vs aero forces dominating the movement... if the resistive forces to slow(er) movements are dominated by aero forces the overall aero centres move the effective 'hinge' - in this case the fuselage yaw centre, fwd of the c.g.
If only a nosewheel is on the ground then it's not hard to picture this as the pont where rotation might be centred due to it's lateral friction, regardless of the c.g.