Portrait of Mark Twain done with a mouse

I was fooling around with a new optical mouse today. It is about one fourth the size of a standard computer mouse and manufactured by iHOME. It only cost me $9.95 at the local dept. store. This drawing was done with just that mouse. I placed it on my knee while I sat in front of the screen and drew in short strokes on top of my upper leg. Less than 30 min. I used Photoshop as the drawing program.