Things go up and down, not that there is an actual true "up" or "down". Relativity is a tricky little dog and when I say "up and down" I do not have an actual reference point except my current existential position. And a sudden interest in fractal geometry, which is confusing, but pretty. It is one thing I have understood but am completely unable to explain. Seems there are a lot of those kind of things around me. Curvature of creatures in flight are easier for me to track (and hit) than something flying straight and at a steady rate. Kind of explains a lot. At least to me.