self portrait sketch

Did this quick little sketch of myself a few months back (September?) in my sketchbook.  Was out sketching at a cafe when the person I was sketching suddenly noticed I was sketching them, so I looked away and caught my image in the mirror next to me and decided, why not!  I was taking a different approach to sketching that day and thought it looked kind of cool.  So I scanned it in and thought I'd have a little fun experimenting with it...
(ball point pen, photoshop).