Whenever there are moving parts, and that includes bows with just a string , then something can go wrong. If you are conscientious about your equipment and check it before, during and after your hunts then you should not have any troubles. Granted there are always exceptions and exceptional circumstances but, under normal circumstances, your equipment, regardless of what it is, should not give you any trouble if it is properly taken care off. Flashlights do you no good in the dark if you fail to check the batterys .