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For those of you who did not know, Dota 2 has injured animations for characters (a few at the moment) that trigger after the character takes a certain amount of damage. It's purely visual and does not affect gameplay in anyway.
Here's a quick preview of Nature's Prophet and his injured animation.
Related Links:
Official Dota 2 Site: http://www.dota2.com/
Official Dota 2 Blog: http://blog.dota2.com/
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