I like continuous line drawings.

I've always liked continuous line drawings.  Also referred to as single line drawings, it constitutes drawing without lifting the pen or pencil from the paper.  Ian Slarsky however, does it blind; meaning that he keeps his eyes on the model and does not look at his drawings. It's hard enough for me to keep consistent ratios (eg. distance between a person's eyes is the same as the width of his or her eye), looking at the model.  To keep these ratios and perspectives without looking at the drawing is a whole nutha ballgame. Enjoy!