Between people, the most blatant form of energy exchange is conversation. What creates such a feeling of chaos in any large public gathering is that people don't know how to listen to each other. To hit an ear words have to be aimed correctly and at the right time, and carefully formulated using the elusive recipe for cleverness and terse substance. Even then fate has the last word on the journey of the message from ear to brain. The goals of self presentation and long term aspirations of everyone mingle and clash, and just sitting still in the midst of it amplifies and exaggerates all the similarities as well as differences between people. Shopping doesn't need to be this complicated. People go to places like markets on a social agenda; to ascertain their own self worth based on the reactions they recieve from others, to be mirrored in strangers.