1. AN ENERGY ABSORBING PNEUMATIC MATTRESS FOR SUPPORTING AN OBJECT HAVING WEIGHT AND INERTIA, SAID MATTRESS AND OBJECT RESPECTIVELY BEING SUSCEPTIBLE OF ENERGETIC AGITATION AND RELATIVE MOVEMENT THEREBETWEEN, COMPRISING A FLEXIBLE PNEUMATIC ENVELOPE HAVING A CONSTRICTED OUTLET, AND MEANS CONNECTED TO THE ENVELOPE FOR CONTINUOUSLY SUPPLYING FLUID TO THE ENVELOPE AT A RATE SUFFICIENT TO MAINTAIN A POSITIVE PRESSURE THEREIN TO DISTEND THE SAME, SAID POSITIVE PRESSURE AND VOLUME OF THE ENVELOPE BEING SUFFICIENT IN RELATION TO THE SIZE OF THE OUTLET UPON AGITATION GENTLY TO ACCOMMODATE THE INERTIA OF THE OBJECT AND TO ABSORB THE ENERGY OF AGITATION AND RELATIVE MOVEMENT OF THE OBJECT AND MATTRESS SHORT OF COMPLETE COLLAPSE OF THE ENVELOPE AND SUFFICIENT AGAIN TO DISTEND THE ENVELOPE UNDER THE WEIGHT OF SUCH AN OBJECT ALL WHILE CONTINUOUSLY DISCHARGING FLUID THROUGH THE OUTLET.