Darkness and light

Thanks Shay,I appreciate your input.I took the shot,self portrait,without any studio lights...and not in the best of natural light.I will try it again sometime when I have things set up better.I had the idea and just wanted to try it right away....I perhaps should have been more careful with the shot itself and the post processing.Its all a learning process,I have never tried a shot like this before and was unsure of how to best photoshop it etc.Any further comments from anyone can only help me along my learning curve,cheers

Dave