Ethnocentrism

[Plague Happy]

Japanese people have a little half-smile they do when they want to look non-threatening.

Yes it's interesting how different people deal with situations. 

Black people have a tendency to prolong eye contact if you catch their eye. Whereas white people usually look away after a moment so as to avoid coming off as confrontational, black people often just keep looking, which creates the appearance of aggression and confrontation.