One day, while swinging at the park, my DS4 silently watched his shadow follow him underneath the swing for what seemed like 5 or 10 minutes and then remarked, "I think my shadow is me in another dimension." The casual observer might have thought he was just zoned out, but he was actually deep in thought the whole time. It was one of those occasions that made me stop and wonder what other amazing things are going on in his head that I don't even know about.