How'd you do this?

...for the "whoah" ;)

its not easy to answer your question. ive used a lot of different techniques to create this. freehand was just one part of it. a year ago, i had done a collage of pics of an old anatomy book. now i redrawed the face i created at that time, and recolored them. then i applied a very high ammount of different type textures to it, and after a lot of detailwork.. this is what comes out.

my first reaction was also 'whoa.. how did you do that?'
but the effect works really well.. nice work :)