I love how Calvin's expression above makes his statement even MORE horrible.....
Can you see the interesting use use of movement in this drawing? How about the sillos/neg. spaces?
Look how well drawn this is! Everything has the appropriate amount of weight. The angle is tricky, yet the perspective is extremely well represented. We can see that Calvin's features are wrapped around a clear shape - there is a subtle corner where the face and the side of the head separate into different planes, although the general, all-around shape is still basically round. Like a human head, Calvin's head is much narrower at the bottom, yet he doesn't always have an ultra-defined chin - only when his expression needs to be devilish like it does here. There is also an EXTREMELY important negative area on the upper-side of his head. Without this the expression would be totally unreadable. Calvin's overall line of action not only dictates his torso but also compliments the angle of his head, the direction of his eyes, the push of his shoulder and his grip of the balloon. the shape of the far side of his shirt frames the balloon. Together they form a curl of negative space that makes the drawing less cluttered and helps us see what Calvin is doing. The lack of detail on the balloon also contrasts with everything around it. It is easy to spot both of his hands even tough you can only see the fingertips on one of them. CLARITY!