1) In the editor place an A-164 and any unit (or just place an A-164 with you as pilot)
2) Enter the plane and ensure it is not moving and you are seated.
3) switch to third person view and enable freeview (default double tap Alt)
4) Exit or eject from the plane.
5) quickly move the camera and watch as your character exits the plane, as soon as he lands his neck should stretch to amazing length.