Time to kill is time to chill..

I am not very good at sketching the curves, and I hardly see any curves at work ;)
Work being in digital systems, there are transitions between 1 and 0, and the only 'time' curves are seen is when the glitches occur :)
At a conference, in the less interesting session I drew this sketch to keep myself busy and to ward off the yawns.



(click for a better view)
What makes it more interesting is the starting point. I start sketching from the tip of the pen and try to sketch the view as it is.