Birdman, I can hit my desk right now with my fist and generate well more than 6Gs. The energy involved (IE the destructive power) is related to the mass. My brain might experience pain in the bodies muscles, tendons, and bone structures and associated organs/tissues, but it will absorb the energy derived from my fist just fine. A whole human body hitting at the same rate will instantly kill you, or at the least severely damage body parts at the focus of different harmonic anti-nodes.