Dancing around the world

Where the Hell is Matt? (2008) from Matthew Harding on Vimeo.
Via Astronomy Picture of the Day

Explanation: What are these humans doing? Dancing. Many humans on Earth exhibit periods of happiness, and one method of displaying happiness is dancing. Happiness and dancing transcend political boundaries and occur in practically every human society. Above, Matt Harding traveled through many nations on Earth, started dancing, and filmed the result. The video is perhaps a dramatic example that humans from all over planet Earth feel a common bond as part of a single species. Happiness is frequently contagious -- few people are able to watch the above video without smiling.

For some reason, I got really emotional watching this clip. The spark of common humanity touches me.