I am vertical, today, if only because after 36 hours of being horizontal, my back finally said "No. Enough. Get your fat ass up." So around 4 AM I woke up with horrific back spasms and no position I could take in the bed allowed me to sleep or even just lay still without incredible, clenching pain.
I got up, put ice on it, and since then I've been moving around. trying to stretch it out or sit in a position that doesn't kill. So while I don't expect today to be one for productive thinking or writing, I'm at least present in this world.