I hope this qualifies as a silhouette. I saw this guy playing in a band while I was taking a walk today, and saw the photo before I took it. This is the only shot I took of him. Hope you enjoy it.
Your subject occupies an uncomfortable space between a silhouette and a lit figure -- it makes him look simply underexposed, more than anything else. Also, his head and the bass get lost a bit in the window pattern behind him.