Physical Expressions include things like voice, the characters face, and gestures. These can all be useful when expressing how someone is feeling and to tap into a characters emotions. Here's some ways to describe them.

VOICE

bass; bellowing; booming; breathy; cackling; childlike; croaking; crackling; drawling; droning; falsetto; faltering; feeble; flat; fluting; gravel; guttural; harsh; hoarse; hollow; husky; hypnotic; lilting; lisping; monotone; nasal; peircing; ponderous; purring; quavering; rasping; reedy; resonant; robust; sensuous; sharp; shrill; soothing; soporific; spluttering; squawking; squeaky; sultry; thick; thin; throaty; thunderous; tremulous; velvet; warbling; wheezing; whining.

FACIAL

bewildered; disbelieving; disgust; frown; puzzled; nonplussed; scowl; smile.

VISUAL

blank look; gaze; glance; glaring; glowering; hard stare; piercing; sideways glance; vague; vacuous; vacant; searching; empty.

VOCAL SOUNDS

ah (satisfaction, surprise, delight, dislike, pain); oh (surprise, fear, anger, pain); aha (surprise, pleasure, triumph).

GESTICULATIVE

Anger - wave a fist in the air; stamp feet.

Dismissal - wave a hand in the air; waved away.

Disgust - throw up hands; turn up nose; wrinkle nose.

Dismay - shake head; slump.

Sudden Dispair - throw hands over face; drop head; drop shoulders.

Introduction - sweep an arm.

Inspiration - clap hands; clap hand to forehead; click fingers.

Shock - clap hand to cheek/s; clap hand to mouth.

I hope that helped in any way at all. This isn't a big one, although these gestures could be used to display emotion quite prominantly. If you have any questions, any at all, please don't hesitate to comment or PM me. I'm always here to help!