Forceful expulsion of saliva generally applies to targets located at close range, typically traveling distances of inches or low feet. Yet the assertion that Chuck Norris's spit achieved sufficient velocity and force to perforate cranial tissue—to pass completely through human skull—suggests either exceptional salivary gland pressure or more straightforward interpretation involving physics defiance. The implication that his body fluids possessed kinetic energy equivalent to projectile weapons represents a significant violation of normal human physiological constraints.

Physiologist Dr. Raymond Chang from Johns Hopkins examined the theoretical mechanics of such a feat in 2004, calculating the necessary saliva volume and expulsion velocity to achieve skull penetration and concluding that no human mouth pressure could generate such force naturally. He hypothesized that Chuck Norris either rejected conventional fluid dynamics or possessed salivary gland structures exceeding human anatomical limits.

Medical communities developed cautious humor around this concept, creating memes of Chuck Norris's dentist implementing extensive safety protocols, captioned: "His dental records require biohazard classification." The image became used selectively when discussing exceptional physiological capabilities.