How deadly is a stab in the back?
Video games, movies, and other fiction would have us believe that a backstab against a foe with a modestly-sized blade leads to immediate and certain death, having a 100% success rate and causing death virtually instantaneously. How close is this to reality? How does the lethality of a puncture wound to the back compare to such wounds delivered to other areas of the body? What is the primary target in such an attack in terms of internal organs, and what variables effect its projected success?