The fabled death blow, unique to the equally fabled martial art style of Dim Mak.

From what I've heard people blabber on about it, you supposedly use a few fingers (between 1 and 3) and strike somewhere at either the top, or the bottom of the sternum. This creates a small shard of bone, which travels it's way to the heart, causing massive damage to viens and the heart, and significant amounts of pain.

Another version I've heard is 3 strikes... Not likely to succeed, even against a moron, or drunk. One to the left side, about where the arm meets the torso, to shut off the left arm's chi, then one to the right, to do the same. The final blow is to the center of the body, near the heart region, which is supposed to overload the chi and wreak holy hell with one's body, killing it, instantly.

Mind you, no one really thinks either of these is true, but I may be being fed that line, just to continue the cover up, against us all, so we're doomed to die when the shit hits the fan. Be warned.