The people weren't posed for this, this was coincident. I was waiting for their best position while they were walking there, I took few frames and suddenly there were a little gap between them and then I got this.
This is great. I really like shots that show people in nature and I'm a sucker for silhouettes. Have you tried making the sky behind the silhouettes the lightest part as opposed to the part on the left? Perhaps try a suplicate layer set to multiply at about 30% and do a layer mask with a circular fill? I would play around with something like that I think it would bring them out nicely and make them more of the subject of the photo from a luminocity point of view.