Inside out world

Everything underground came up to the surface and everything on the surface went underground and as it did buildings collapsed leaving the earth rocky, hard and broken as all animals, people , trees , fences , homes , schools , cars and all transport except the Underground fell off the earth and were bobbing around in outer space. The Underground became the new surface transport and was the only transport on earth. All was brown,dark and there was no brightness at all. Dirt, filth and mud covered squelchy,damp ground. Thick, muddy water flowed where seas, rivers, lakes and streams used to run clear so there was no clean water just rivers of mud and slimy algae.