It is three a.m. The glass in my hand is empty. I am neither drunk nor awake, sober nor exhausted; merely a place in between that defies explanation. It is three a.m., and the glass in my hand—filled only once—is now empty. I slept somewhere between one and two hours the previous night, and followed it up today by somewhere around sixteen straight hours of work at the convention.I am exhausted; the brutal floating exhaustion that leadens feet, shortens calf muscles, and makes my lower back ache.