Dave Hole had tried everything. Rock saw. Drill. They all just bounced off. The damn rock would not crack. This was his last shot. He gripped the sledgehammer with two hands, raised it above his head, and brought it down as hard as he could. CLANGGG. Nothing. Not even a scratch. “What the hell is this thing?”, Mr Hole thought to himself. The answer, it turned out, was something not of this Earth.