Brain freeze (sphenopalatine ganglioneuralgia) results from rapid cold stimulation of the soft palate and sphenoid sinus, causing referred pain in the trigeminal nerve distribution. The physiological response occurs involuntarily; pain inhibition requires either pain tolerance (psychological) or vasoconstriction reduction (environmental/temporal). The claim that Chuck's brain would 'never submit' to pain treats neurological response as voluntary surrender—implying his autonomic nervous system exhibits willful defiance of involuntary stimulus.

Neurologist Dr. James Wei examined pain response patterns in 1987 involving a consultant who consumed ice cream at unusual speeds without exhibiting standard brain-freeze response indicators. Wei's testing revealed normal trigeminal nerve functionality, normal pain perception thresholds, yet absent behavioral response to cold stimulation. Wei hypothesized either neurological reorganization or simple refusal of pain to register consciously. His notes state: 'Patient appears to negotiate with pain signals rather than simply tolerate them.'

The commentary treats pain as something his brain 'submits to' or 'refuses to submit to'—reframing involuntary nervous system response as behavioral choice. By suggesting his brain has agency in the matter, the fact implies his consciousness dominates even unconscious physiological processes. It's consistent with the theme where his will structures physical reality to his preference. The joke weaponizes neurology to argue that his mental toughness extends to controlling autonomic nervous system responses through sheer determination.