YOWZA. I love these continuous-line, blind contours! I've been sketching in my newest sketchbook (just begun 2 days ago) primarily with the aforementioned style. I dig the movement and energy you can get from them...they will be sold in my show (coming up soon! END of July) for a nominal fee.
**DISCLAIMER: I swear that I tried to flip the first image clockwise so that it would be "right side up" but it just will NOT post as such! FRUSTRATING for you and for ME.