A Random

SCIFI.radio story

Earth receives a visit from future selves with warnings of impending doom who want to plug us into a power grid and use us as living batteries even though they can all do credible singing impressions of Ethel Merman who derive their sustainance by a bunch of kids playing disco music on boom boxes , but scientists create a new weapon which turns them into weird rocks.
The End.so they eat us all.
The End.