Class in Antarctica; a submarine to simulate zero-gravity and we are students of astronomy and sociology. I am late for class and have been watching the opening hour on closed-circuit TV. A cold-related injury has given me a good-enough excuse for not making it on time. During the class’ intermission, I make my way over to the submarine classroom as best I can. The pathway is a narrow strip of ice over a rail-less catwalk; on either side of the walkway is thin ice along the surface of the ocean. From within the submarine, I hear the jokes of my classmates. Walking, I slip and come crashing down on the wrong side of the walkway. The ice holds (but barely) and I don’t slip through into the deathly freezing water. Instead, I bounce over to the other side and nearly break through that ice as well. I try to cling to the ground, try to crawl back onto the catwalk, but gravity is getting away from me.