It begins as nothing; the barely noticeable loss of equilibrium, a tremor in a once-unshakable calm. Then, a minutely clenched jaw, a tightened fist, not entirely smoothed away by reasoned logic.
The mind reflects, but discipline fails to eradicate irrational, baseless thoughts of portending doom. The illogic of persistent, unwelcome feelings foments frustrated irritation that cannot be rooted out.
Her presence, or worse yet absence, only magnifies this. He is angry, and does not know why. She worries, wants to sooth him, and that knowledge only threatens to infuriate him more.
He recognizes his demon in the mounting, unstoppable tension.