This is the kind of thing that I see when I look around at things
Images and visuals pop into my head when I look at stuff. When I look at waves on the water, whether it's in a pond, a river or out in the ocean, "Fourier Transform" always pops into my head. There are equations of motion when I look at moving objects., density and phase changes when I see crowds, the flow of air moving around something, sound waves bouncing off surfaces, electric and magnetic field lines (and all kinds of associated EM equations). I don't see them in a literal sense, but in my head I see the patterns overlaid on top of what I see.
Activities like playing pool are an interesting exercise, although I have to say it hasn't really helped improve my pool playing skills.