I met Marcus Davis decades ago at a UFC event in Las Vegas -  little did I know that he had been following me in my system for many years before that we met. 

We hit it off right away and have remained friends over the years.

After he retired from fighting, he began including elements of my philosophy and my research around the startle-flinch response, aka, the SPEAR SYSTEM to those he trained in self-defense.

Marcus was a pro boxer, a veteran of the UFC, and fought in many other organizations. Fans of fighting, martial arts, and self-defense will enjoy this!

More on Marcus's background here: https://en.wikipedia.org/wiki/Marcus_Davis