I know what you mean, it looks like a lot like one of the loading images used in GW2 I did a quick Google search though and found this http://jcbarquet.com/ ht

I know what you mean, it looks like a lot like one of the loading images used in GW2 I did a quick Google search though and found this http://jcbarquet.com/ http://jcbarquet.com/ which makes since since they credit him in the bottom right of the picture