Of, relating to, or arising from one's mental or spiritual being: inner, interior, internal, intimate, inward. Slang gut. See body.
Derived from or prompted by a natural tendency or impulse: instinctive, instinctual, intuitive.
Like "eating food with your hands", this feeling of connection and one-ness was experienced by all who are around them. And for this epicness, "Visceral" would be a term that one can now use over words like "paramount" or "echelon".