She asked me if I'd walk her to the train, and I said yes, but only because I wanted to hold this again: a portable membrane against the fourth strongest force in the universe.
Electromagnetism, I mean. Every raindrop that hits this stretched nylon is stopped not by the fabric touching it but by the electron clouds of the fabric refusing to occupy the same space as the electron clouds of the water. Nothing physically touches. It never does. The drop hovers a fraction of a nanometer off the surface, repelled by fields, and slides away having never made contact with a single thing.
Look at how little material is doing this. A canopy that weighs perhaps three hundred grams is deflecting water that fell from a cloud a kilometer up, water that arrived at terminal velocity, roughly nine meters per second, each drop carrying the last echo of energy the sun poured into the ocean to lift it there in the first place.
The whole apparatus of evaporation and condensation and gravity, the entire hydrologic engine of the planet, and I am cancelling it with eight aluminum ribs and a spring catch.
And the water itself: two hydrogen nuclei forged in the first three minutes after the beginning of everything, bonded to an oxygen atom cooked in the core of some dead star, assembled into a molecule so lopsidedly charged that it clings to itself, which is the only reason it falls as a drop and not a mist, the only reason a drop is a thing an umbrella can turn away.
She was already through the turnstile.
I was still standing in the rain with it open, watching thirteen-billion-year-old atoms bead and run off the edge, deciding not to hit me.