Alright. First of all, I find this piece amazingly original. Since my time here on DeviantArt, I've never seen anything close to this. It really does look like the mind of a great thinker. moving, dense, and looks like it can power a huge amount of ''Trains''. Altough most people will not like/trust him, because he looks like he can break at any moment. The houses in the horizon give this work a bit more ''Humanism'' to put it that way. Overall, I find this a magnificent piece, and you can find the meaning of the picture quite well.
And my apologies if my Critique comes over a bit crummy. My English can abandon me from time-to-time. :U
Depends on what you consider as "manipulation". I have only converted it to black and white. cropped it a bit and upped the contrast, that's all. The compression effect comes from the focal length of the lens.