My brain spasm for the day:

Ran into this on another thread from Rapaire, and was wondering why you have books like that about.

According to Captain W. E. Fairbairn, in Get tought! How to win in hand-to-hand fighting as taught to the British Commandos and the U. S. Armed Forces (Paladin Press reprint, 1979; "an exact reproduction of the original" [1942]), page 99, figure 112, the heart lies 3 1/2 inches below the surface and a knife attack to it would result in instantaneous lossof consciousness and death would occur in 3 seconds.