If you are rescuing them why would you be pushing any of their buttons? Do you know how a regulator works? If they are out of air it doesn't matter if they have an Octo or not!!
How do you bring an unconscious diver from the bottom to the surface? ... and who said the potential victim was out of air? I think the discussion was pertaining to the use and training of the Air 2 type device. Not whether or not the diver was out of air. If he or she was conscious and out of air, the diver would be receiving my donated primary regulator, not their own Air 2. So don't shake your head at me.