It took him an hour or so to realize that escape through normal means was 
hopeless. He didn't even try to figure out the labyrinth's floor plan; instead, 
realizing that it couldn't possibly be larger than the ship, he followed the 
foolproof expedient of turning right at every corner, which as all clever boys 
knew must always lead to an exit. But it didn't, and he did not understand why 
until once, in the
corner of his eye, he saw a wall segment shift sideways, closing up an old gap 
and creating a new one. It was a dynamic labyrinth.