 Why couldn’t David move after he first opened his eyes?
There was no sensation of place, no feeling of up or down, no direction. He was as still as death, motionless without warmth or breath as I hovered over him. The eyelid remained open until I closed it and went on. It waited for human hands to make it operate. I went from the nose to the last bulkhead in a frenzy of floating motion, looking behind each door until I went as far as I could. It meant the engine or engines took up half the ship, cut off from the forward half by the instrument studded shield. Complete amnesia would have been terrible enough but this half knowledge, part awareness and association with the ship was a frightening force that seemed ready to break out of me.
 He had a wide seatbelt on.
 He was in suspension.  He was in a tight space.  He had a wide seatbelt on.  He was weightless.