Oh, I know... there are so many new things to discover in every-day situations. Looking at the flow of things is one interesting way of learning of relationships: flow of people, flow of energy (including money), or very concretely, flow of hot / cold air, flow of water, where animals move, etc. Or repetitions, that is things occurring on a regular basis. Why? How? Alternatives? Are there any unclosed loops? Sure, all this sounds confusing in theory. Once you put them into practice, it's like: how come I've never noticed?