Reasonable apprehension of the danger of injury constituting the criterion of liability, whether the question be one of negligence or causation, is it a prerequisite to liability that the respondent should have foreseen the precise manner in which the injurious result was brought about, or is it sufficient to impose liability upon it if a generally injurious result should have been foreseen as reasonably probable in the light of the attending circumstances? If the former, it is argued that the ignition of explosive gases in the hold of a barge by lightning is so extraordinary, and so unprecedented an event, as not to be reasonably anticipated as a probable consequence of the alleged wrongful