"Sometimes we see a cloud that's dragonish,
A vapour sometimes like a bear or lion,
A towered citadel, a pendant rock,
A forked mountain, or blue promontory,
With trees upon't that nod unto the world,And mock our eyes with air.."
If you don't know it's impossible it's easier to do. And because nobody's done it before, they haven't made up rules to stop anyone doing that again, yet. — Neil Gaiman