John has just slipped and fallen eight metres from a ladder onto a concrete path beside his house. Although he seemed to hit the ground hard, he is still conscious. He is motionless but groaning...

John has just slipped and fallen eight metres from a ladder onto a concrete path beside his house. Although he seemed to hit the ground hard, he is still conscious. He is motionless but groaning horribly and there seems to be blood coming out of his mouth. He must be seriously hurt.