Well, that nails it down.

In one of Tony Sanchez's books he talks about taking the frontal brain by aiming at the top wrinkle of the trunk when the head is held normally.

With all due deference to Mr. Sanchez, the frontal brain shot can span about a 3 foot length from the upper part of the skull to well down the trunk. There are many people that can pull this off, of which I am sure Mr. Sanchez is one, but it is a tough shot, especially in an emergency.

My hat is off to the guys that can pull that off when about to get hammered.