Supose you are using the over-contrasting as some effect but I dont like it very much. Also I think that the frame is to thick, think people have to go careful on them.
Whilst I do sometimes like the mood that harsh lighting can add to an image, I think it's overdone in this case. I do like the composition - the angle of his face and finger and the cropping choice work well.
I like the pose and composition. Face and hand out of focus, but shoulders look great! ;) Harsh lighting on face and distortion make for interest, but theme of silence could be explored a little deeper. Keep it up. :)
The artistic approach doesn't make this photo all that much better. I like it, but it's still just a guy 'shushing'. 5. [the direct flast would normally suck royally, but it works here]