So many questions....If you're in the middle of a room with this floor...... um, how do you get back out? is there an escape hatch? Could this be used in some f

So many questions....If you're in the middle of a room with this floor...... um, how do you get back out? is there an escape hatch? Could this be used in some fancy new prison? Could they add some sort of energy generation, so walking generates energy? Would that create even more incentive to incarcerate more people for longer? Where do I get one?