Blur, it looks to me that you have a better than average understanding of dynamic anatomy and a good sense of proportion and perspective (i.e. the rear-facing arm). Have you read Byrne Hogarth's books? HB lead makes a good line, for sure, but I tend to go with blue-line. Less erasing. If you want my unsolicited advice, I would suggest that you try varying your line thickness to give your figure more volume and enhancing the activity of his movement. You might also experiment more with foreshortening and try rotating the character so that he doesn't face the viewer directly. An angle that looks like he's running about 3/4 from perpendicular to our view is just about awesome. Other than that, it really is easy to see where your detail work is, and the coloring is pretty good, too, just lacking the proper material to make it look the way you'd like. But the tones are even and you haven't left much as far as blank spaces. It also seems you have a knack for drawing hands, which most professional comic artists will tell you they despise. I'd have to hail it a success. Awesomely done!