Domestic square dance is actually a popular flash mob of young people in the U.S. some years ago, and in China, it has become the square dance of the big moms. The United States is sparse, complex community structure, the elderly generally do not live in the city, and look at the young people dancing flash mob is very good to see the big mom dancing square dance is very disturbing, as a majority of highly educated countries, American women do not have to make fun of themselves.