On the streets of Baku earlier this year, an Azerbaijani police officer detains a protester of the Musavat (opposition) Party. In the midst of the arrest, he exhibits two strong emotions. His protruded jaw, known as a "Jaw Jut" is a classic nonverbal signal of significant anger. Moreover, it is particularly common when the anger is strong enough to be a harbinger of, or coexists with a physical action (nearly always directed at the perceived source of anger). Thus, when you see this body language displayed, be warned, for violence is often imminent.
In addition, the officer's bilateral and symmetrical nostril flaring, deepened nasal-labial furrows, tightening of his "mustache region" and raised upper lip - all indicate the emotion of disgust. Emotions rarely exist in isolation - often two or three are simultaneous and quite evanescent.