Brain Damage

In severe head injuries where brain tissue is protruding, leave the wound alone; carefully place a first aid dressing over the tissue. DO NOT remove or disturb any foreign matter that may be in the wound. Position the victim so that his head is higher than his body. Keep him warm and seek medical aid immediately.

DO NOT forcefully hold the arms and legs if they are jerking because this can lead to broken bones.
DO NOT force anything between the victim's teeth - especially if they are tightly clenched because this may obstruct the victim's airway.
Maintain the victim's airway if necessary.