"unless there has been something which a reasonable man would blame as falling beneath the standard of conduct that he would set for himself and require of his neighbour, there has been no breach of legal duty."
"the person dealing with [an inherently dangerous article] may well contemplate persons as being within the sphere of his duty to take care who would not be sufficiently proximate with less dangerous goods; so that not only the degree of care but the range of persons to whom the duty is owed may be extended."