Not cut paper, but a great example of cross contour. Faces by Patrick Seymour In his series entitled Faces, designer Patrick Seymour from Montreal Canada uses bold lines and symmetry to create some striking line art illustrations.
Illustration by Richard Wilkinson: The angle at which we appear to be viewing her from makes be thing that the right of the eye needs to be elongated and some white placed in. Human eyes have a curve, yes, but they don't just drop off like depicted here.
Astounding stereographic projection by Greek photographer Chris Kotsiopoloulos combines 24 hours into a single panoramic photograph. A great explanation of stereographic projection here, along with more images.