Ballet dancing is clearly the hard nut of the dancing world, and you don't need to watch Black Swan to know that it requires immense practice and dedication.
In this video from the Washington Post, just how insanely difficult it must be to be a top ballet dancer is revealed, as six dancers from the Washington Ballet show off their moves in slow motion.
Elegant, strong and utterly mind-boggling.
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(H/T: Twentytwowords.com)