There are a few videos on youtube explaining it. http://www.youtube.com/watch?fe... | Hacker News

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leoalves on June 18, 2013 | parent | context | favorite | on: Brazil protests spread in Sao Paulo, Brasilia and ...

There are a few videos on youtube explaining it.

http://www.youtube.com/watch?feature=player_embedded&v=AIBYE...

http://www.youtube.com/watch?v=ZApBgNQgKPU

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