I think they look both pretty evil Very interesting pic indeed.
We rarely have photojournalistic work here, so that makes a change.
Might profit from more contrast maybe; the highlights are a bit darkish.
Oh, I agree, I love the photo idea. I want to know what on earth those guys are doing ... it looks and is shady. I mean, what kind of business really happens in an alley (or maybe they were doing something innocent like trying to get good phone reception!).
I second Marc's suggestion that maybe a bit more contrast would help and maybe just a slight bit of dodging around the left guy's neck ...
But good style, good eye; great addition to the POTM, where so many of the images are "staged" ... I like the fresh/photojournalistic feel of it.
Thanks for the C+C. Maybe I'll go back and give it a little love in photoshop. Currently I haven't done any PP on it. The picture was taken on Golden Lane in Prague.