Wednesday, May 22, 2013 11:13:52 AM
It totally depends on where your mind focuses on the picture, if you look deep into the tunnel, your mind is filling in the blanks and its going in, if you look at the far right of the picture, again, filling in the blanks it's leaving the tunnel. If you just watch the center you can see, in actuality, the train is f**in the sh## out of that tunnel.
Wednesday, May 22, 2013 6:57:43 AM
It looks to me like its just f*cking the tunnel. Its going back and fourth quickly to the point where it gives the illusion of moving consistently in one direction or the other.