Carelessness Have you ever done anything stupid, something that you know puts you at increased risk of injury? When you realize how stupid you were, whether you got hurt or not, do you ask yourself, "Why did I ever do that?" For your own future preservation, this should be a very important question for you to answer yourself. Consider the fact that approximately 20% of injuries are due to unsafe conditions and 80% are caused by unsafe acts. If you realize that most unsafe conditions are brought about by human failure, then virtually all accidents are brought about by unsafe acts....