The last external flow trigger, “deep embodiment,” is a kind of full-body awareness. Humans have sensory inputs all over the place; 50 percent of our nerve endings are in our hands, feet, and face. We have as many neurons in the gut and heart as in the brain. We also have proprioception to detect position in space, and vestibular awareness for balance. Deep embodiment means paying attention to all of these sensory inputs at once.