And as per that top voted comment: The question of whether the last gear will break the concrete is moot. The gears themselves will erode away to nothing befo

And as per that top voted comment: The question of whether the last gear will break the concrete is moot. The gears themselves will erode away to nothing before they get a chance to apply much torque to the final gear. I think that the same argument can be made to this Lego demo as well ;-)