rhapsody13 wrote:
....smile at somebody in London & they look at you as if you are one....
People in the city are very suspicious - smile at them and you are not going to get a smile back, instead they may report you as a possible terrorist. By smiling you tell them that you do not live in the city, that you do not understand that this is suspicious behaviour, you have something to smile about.
They don't, they live in the city...