This is a very small drawing (ca 10×10 cm). I love to make these to keep my hands busy and my head empty. Just a stack of small papers and all I do is putting lines on them and sometimes figuring out if it really represents something. You could call it therapeutic doodling. Very calming!
By the way: this one I reworked with photoshop, which took a much more time then the original drawing did. So much for efficiency when working with computers.