There is a process that can be run to run out immobilization.
To give you an example of this, let us take somebody who has taken an ordinary train trip for a very short trip. He has gone on the usual smooth velvet-railed Pennsylvania. And he has arrived in New York after a passage from Philadelphia. It is not a very long train trip, but it is enough to have impressed him with the fact that he was sitting still. Now you ask him to, look around and tell you something that he could do. "I guess I could reach over and push that chair a little bit with my foot."
Along about this time, something strange would happen. The clackity-clack of the rails would turn on. He will say, "Well, that is fine." And you give him the command again. He is weary now. "I could probably pick up this match." And the rails will once more go "lurch" and he will get body motion, and he will get all the rocking around that the velvet-smooth Pennsylvania Railroad as given him. That rocking around will run out rather rapidly. Why?
On the train in more ways than one, he was in a no-game condition, but technically, as far as we are concerned, he was being an effect of something else that was moving his body, and considered him part of the body, and therefore was moving him. He was being the effect of something else for a period of time.
This we could look at with a great smooth explanation, and say, "Well, of course, the guy was immobile. He didn't dare get up and play football in the aisles. He didn't rush around and get very active and clobber the conductor. He couldn't get out and run along the side of the train. He couldn't do these things." Naturally, a fellow is immobilized and therefore he is on one tremendous big rest point and he is stuck on the time track.