You've got to get your casualty from the cause, but make sure it's safe for you, now if it is a, a place where you've got to get your casualty out and you haven't got a lifeline and I must express this really that there must be two of you and if you are going in you only go in if you think it is safe to go in and you must have a line attached to you and there's somebody outside, so that if you do get erm overcome by fumes or whatever, they can pull you out, you are safe, they'll see to you, if there is no hope, you don't try to be the hero, what you do is go and make a phone call and get the professionals in, because they don't want to come along and have to deal with two casualties, when there's only one.