6 So far as the issue of contributory negligence is concerned, I agree with Miller J that this was not a case of temporary inadvertence or inattention on the part of the appellant which was "excusable in the circumstances because not incompatible with the conduct of a prudent and reasonable man" (see Sungravure, above, at 37, per Windeyer J and McLean v Tedman, above, at 315, per Mason, Wilson, Brennan and Dawson JJ). Rather, this is a case in which the appellant made a deliberate choice to risk his own safety rather than to take a more inconvenient, but less dangerous, course. In doing so he failed to meet the standard of care to which he was required to conform for his own protection and it was this lack of care, together the appellant's default, which brought about his injury. I agree with Miller J that an appropriate apportionment would be one of 50 per cent.