Spike has two "settings" - stop (sleep) and go (chase). During the day he moves around from cat bed to cat bed, with a sojourn at the front window on a wooden stand. In between sleeping, he loves to chase whichever cat happens to be unlucky enough to walk by. It is a short lived chase - since he has a short attention span. Apparently he is in chase mode during this particular cat nap - as you can see by the twitching toes.