I came up with this after a little people watching:
What is this, "swinging your arms as you walk," thing? It's weird...under certain observational condition, it is one of the most interesting things you can see. People walking around, swinging their arms to and fro. You can be happy (and swing them merrily), you could be angry (and swing them furiously), you can be bored (and they swing sadly), but they all swing. Sometimes we notice and sometimes we don't. Humans: becoming increasingly interesting...no wait, nature: becoming increasingly interesting with more observation/perception.
