He wasn't fazed. I mean that. I'm studying for my psychology degree for the next 90 minutes. Think about it - I'm submitting an essay on body language next week. I saw the point.
Body language is a fascinating subject but hard to study.
Stare at a man in a bar, for instance, trying to plot his progressive inebriation by his increasingly erratic body language, and you'll have to be very discreet. Catch his eye inadvertently, and he might think you're looking at him. Which you are. He might think you want to start a fight. Worse, he might think you like him.