In King of Tokyo, you gain victory points for entering (and starting your turn in) Tokyo, but it's very painful to stay there - all of the other monsters are trying to kill you. Can you leave Tokyo voluntarily? If so, under what circumstances?
This came up because there's a demo video that shows players leaving voluntarily, but the rules don't seem to have anything about it; I don't see any way to leave Tokyo except by yielding after taking damage.