Forgive me if this sounds ignorant; I have no professional knowledge of physics. But I've wondered if it is possible to obtain free energy from gravity in this manner: I remember seeing a documentary on an attempt to build the world's tallest building. Apparently, it could only be built so tall (a couple of hundred miles at the most I believe) before the foundations collapsed. The foundation would collapse because it would melt, and it would melt because of the heat which came from the pressure of all that weight on top of it. If someone built a similar structure, larger than any modern day building but still vastly smaller than the theoretical, I suppose we could call it "melting height", to the point where the foundation's temperature was elevated even a few degrees, would that not constitute a constant, "free" flow of energy, derived solely from gravity?