Not exactly chaos, more likely organized chaos. The Cambridge dictionary defines organized chaos as:
a situation in which there seems to be a lot of confusion and no organization, which makes you surprised that the results are good
That definition seems to fit perfectly with the annual motorcycle trek to Sturgis, South Dakota and the surrounding cities. It has been estimated that as many as one million motorcycle enthusiasts visited Sturgis and the surrounding areas during the 75th Anniversary of the rally in August, 2015. This image, taken in the small town of Deadwood shows only a small portion of the organized chaos that occurs in the Black Hills during this week.