At the other you have the "Get professional help to the casualty" type - the person is not going to recover with your help alone, so your task is to keep them in the best state for the professionals - that means keeping airways clear, doing CPR, Stopping serious bleeding, watching for signs of shock. After that it is a question of watching and keeping the casualty comfortable.
...
fek - me thinks someone hasn't quite got to grips with the 'risk assessment' bit of urbexing
sits and waits quietly for barrarge of bullsh1t and nonsense firing my way :