Astounded/In Awe

an overwhelming feeling of reverence, admiration, fear, etc. produced by that which is grand, sublime, extremely powerdul, or the like

Hand on chest, head tilted back slightly, eyes and mouth wide open
Mouth open wide staring at subject
Hands on top of head, as if pulling hair, Mouth open but in a large smile, possibly pacing is the situation warrents it

Back to feelings.