Overlong emotions point at the fact that a person is acting, singe you can stay surprised or shocked for a long time, but the expression of surprise on your face can last for merely a second.
Сrossed arms are usually a symbol meaning that a person wants to stay calm and is closed now, therefore, it's better not to try to activate him.
The interesting point is that men often begin smarten up being in front of their 'target' (removing non-existing dust on sleeves, adjusting a tie, etc.).
The most aggressive gesture is when a man puts his arms onto his belt. Another way is when he turns the whole body to a woman, pointing with a toe-cap onto her. This is usually followed bu a longtime glance.