love this shot man! very cool....too me it looks like you are in a club, up on a DJ stand....the crowd going crazy down below dancing in the brilliant light. nice overall tone to the image as well.
I'm not really sure a sihlouette is what they were looking for...but...I do like the background color but think I would have liked it better without the vignette affect. The focus is good. Good luck to ya.
I think the word "portrait" is a loose word. I generally think of being able to see the face. This is a great picture, the color is wonderful and the silloutte is great. You have my vote.