In the present case the learned trial judge recognized that there were certain risks inherent in the sport in which the participants, including the appellant, were engaged. He pointed out that there were obvious risks "about which the participants could not complain" and that it was for the jury to say, in effect, whether the appellant's injuries had resulted from his exposure to such a risk, or, whether they had resulted from his exposure to some other and additional risk. By way of illustration he added: "I am dealing here, by way of illustration, with only one of the heads of the plaintiff's claim. Similar considerations would have to be applied to the others. If, however, a failure to warn was tantamount to a breach of the rules of the game, rules which, although unwritten, each was entitled to expect the others to adhere to, then it will be open for the plaintiff to succeed on that ground. Whether he would succeed on it or not would depend on considerations which I will be putting before you in more detail a little later." I observe at this stage that it is, perhaps, unfortunate that his Honour used the expression "rules of the game" but it is clear enough upon reading his summing up as a whole that he did not intend to indicate that a mere breach of the rules regulating the manner in which the sport should be performed or played would give rise to a cause of action. So much is clear from what he said later: "May I suggest that you approach this by putting a reasonably careful member of this team of water skiers at the helm of Torpy. Let us call him Mr. X. Mr. X is a friend of the other skiers, he is a reasonably competent skier and he takes his turn with the other members of the group at driving the boat and Mr. X has been doing this regularly for several seasons. Mr. X could be the plaintiff or Mr. Walker or Mr. Wilton or the man we have not seen - he could be anyone of the five. Now assume that Mr. X is exercising the degree of care which this group of men voluntarily accepts as being appropriate. If he is doing that, if he is showing the degree of care which this group of five considers appropriate in this game or sport or pastime, then they cannot complain even if one of them sustains an injury because the rules of the game are not being broken. It would not matter if you as bystanders, sitting on the bank or sitting in the back seat of Torpy, took the view that hideous risks were being taken. That would not matter, provided Mr. X, the driver, was in fact exercising that degree of care which each of these men expected of the others." Then after discussing the evidence at some length he said: "Fundamentally the question you have to ask yourselves - to which the answer depends, you might think, on what I have just put - is this: would a reasonably careful driver (our Mr. X) exercising such degree of care that these men expected of each other, taking no risks other than the accepted risks of the game, have given an indication, a warning, of the whereabouts of the boat in all the circumstances? Would he have given the boat a wider berth by going closer to the other bank? That, you may think, will depend on answering the questions I have put." There was no objection taken by the respondent to the summing up and, indeed, no exception was taken to it upon the motion before the Court of Appeal. It seems to me that the issue which was substantially left to the jury was whether the appellant's injuries had resulted from a risk inherent in the sport or whether they had been caused by the respondent's conduct in unreasonably exposing him to some additional risk, that is to say, a risk to which his participation in the sport could not be said, necessarily or ordinarily, to expose a participant. This, in the circumstances of the case, was essentially a jury question and there was ample evidence upon which they could have answered it in the appellant's favour.