If it is fast enough to have any consciousness it should be both sides.

That is interesting, Compos. Why vertical cut is an exception? Can you give further explaination.

Have you encounter case of being badly wounded but feel not pain at the moment the injury is inflicted? The pain is only felt much later. In such case do we say there is no consciousness because we are not aware of the pain. Or that there is conciousness becasue you are alive and kicking?