Imagine a solid chain from the Earth to the moon's surface (which I believe is 1.5 light seconds away). Now Imagine two scenarios. First scenario is that the chain is attached directly to the moon's surface. Second scenario is the chain is unattached. What happens if I tug on the chain in both scenarios? If information travels at the speed of light, how does the universe know whether I should be able or unable to pull the chain at that moment?