Japanese usually do not express emotions or anger in public, but I sometimes encounter situation which remind me that they would actually like to do it.
In a very busy train, as usual, going back home, a guy stepped on a woman’s foot. He did not face her, so probably did not notice he stepped on her, and could not see her facial expressions.
It hurt her, very badly, but the interesting part was not that pain, but her facial expressions after that. She needed to express anger, so it was like watching Pantomime of expressing anger. She was actually very expressive, but without a voice. I guess she would not have done it if he was facing her.