sensory writing

Our second task is about sensory writing. Our teacher asked us to leisure time, in the school cafe or restaurant, we quietly sitting among the people, to seriously to listen to the people around us, know them how to express and communicate.
In the beginning, I thought it was a stupid task, should we go to listen other people's speech? Around us there are lots of people every day, is it worth our listen on their talk?
But when we sat in a cafe, we sit down, quietly listen to the voice of the side, really feel completely different, as they are in another space, the people around you cannot be aware of your presence.
Has various people around us, they have different things every day, different mood, different fate, their joys and sorrows are all expressed through their language, the tone of their rich expression with cadence, graphic depicts the story, as if just around the corner.