The silent treatment
The guy was trying to pull of the mysterious stranger / silent loner/ toughguy act,
such as Clint Eastwood might have done in his westerns , as one example.
Or Snake Plisken.....
but he just came off a a maladjusted ignorant social retard.
I was shouting at the TV "Some one just spoke to you - you are supposed to reply! Whats wrong with you???"