Obvious risk
23Section 5F(1) defines an "obvious risk" to a person who suffers harm as a "risk that, in the circumstances, would have been obvious to a reasonable person in the position of that person". It has been described as one which is clearly apparent or easily recognised or understood: see Jaber v Rockdale City Council [2008] NSWCA 98; (2008) ATR 81-952 at [35], [38], [39] (Tobias JA, Campbell JA and Handley AJA agreeing); and Laoulach v Ibrahim [2011] NSWCA 402 at [79]-[80] (Tobias AJA, Giles and Macfarlan JJA agreeing). It may include a risk that has a low probability of occurring and one which is not prominent, conspicuous or physically observable: s 5F(2), (3), (4).
24The risk which is the subject of the inquiry called for by s 5F is that which is the subject of the claim for damages to which the provisions of Pt 1A of the CL Act are to be applied by s 5A(1). In CG Maloney Pty Ltd v Hutton-Potts [2006] NSWCA 136 at [173] - [174], Bryson JA (McColl JA agreeing) described that risk as that which "matured" and "caused [the plaintiff's] injury". The forward-looking inquiry required by s 5F is whether that risk of harm would have been obvious in the relevant sense to the hypothetical reasonable person in the circumstances of the plaintiff: Streller v Albury City Council [2013] NSWCA 348 at [31] (Meagher JA, Ward and Emmett JJA agreeing).
25Initially, the primary judge described the relevant risk as being the risk of falling when undertaking the "activity of walking down stairs whilst wearing ice skates at an ice rink": [82]. In his subsequent discussion of that question, the primary judge also took into account that the stairs were wet and that they had the varying dimensions measured by Mr Burn. His doing so raises a question as to whether those characteristics should for this purpose form part of the description of the risk which materialised and caused the respondent's injury. The appellant submitted that they should not and the respondent when pressed in oral argument, formulated the relevant risk as that of falling or slipping whilst "stepping down a flight of stairs wearing skate boots, the blades of which extended beyond the width of the going" (or tread) of the stairs.
26Having so described the relevant risk and referred to the judgments of this Court in Jaber and Laoulach, his Honour continued at [84]:
"The analysis must begin with the non-controversial proposition that the activity of descending down stairs carries with it an ever-present risk of falling, even when wearing normal footwear. By extension, that risk must also be present when descending stairs whilst wearing ice skating boots. Such risks would obviously be heightened where the person descending the stairs was aware of the surface or edge nosing being wet and where the treads, goings and risers were the subject of unevenly distributed dimensions. In my view, these considerations are patent, and must be assumed to have been within the common knowledge of people in the community who act reasonably: s 5F(2) of the CL Act."
27Stopping there, his Honour's statement as to "these considerations" being patent and within common knowledge is to be understood as being that a reasonable person would have appreciated that there was an ever present risk of falling when walking down stairs wearing ice skating boots and that such a person would consider that risk to be heightened if the stairs were wet and the treads and risers were of unevenly distributed dimensions. However, having regard to his Honour's later findings at [90] that the respondent was not aware of the uneven dimensions of the stairs and that it had not been shown that he knew or ought to have known that the stairs were wet, these observations at [84] cannot be understood as being that these two (factual) matters would have been known to or appreciated by a reasonable person in the respondent's position. The appellant challenges that conclusion insofar as it is that a reasonable person in the respondent's position would not have appreciated that the stairs were or were likely to be wet or moist.
28Focusing on the language of s 5L(1), which is concerned with risks of a "dangerous recreational activity", the primary judge then addressed whether the appellant had established that the respondent's injury resulted from the "materialisation of an obvious risk": [87], [94]. He did so on the basis that the conditions or circumstances that gave rise to the risk of harm which matured included that the stairs were wet and that they were of uneven dimensions. The appellant also challenges each of these conclusions.
29The primary judge addressed that question by reference to several matters. First, he considered whether the appellant had established that the activity of descending the stairs was a "dangerous recreational activity" and concluded that that activity was separate from the recreational activity of ice skating: [88]. Whilst that conclusion was relevant to the issue arising under s 5L and was in my view correct, it was not relevant to the question of obvious risk. Secondly, his Honour considered whether the evidence established "any unreasonable conduct" on the respondent's behalf in descending the stairs: [89]. Whilst that matter was relevant to the defence of contributory negligence, it also was not relevant to the question of obvious risk.
30The third matter which the primary judge addressed was whether the respondent had "either actual or constructive knowledge that descent of the stairs whilst wearing skate boots involved an obvious risk": [90]. In doing so, he considered four factors. Two were the uneven dimensions of the stairs and that the stairs were wet. The primary judge held that the respondent was not aware of the former and that it had not been shown that he either knew or ought to have been aware of the latter. The two remaining factors considered by the primary judge were whether the respondent had been given any general or specific warning of risk "due to the state of construction of the variable dimensions of the stairs" or made aware of any conditions of entry that excluded liability for the "condition of the stairs": [90].
31At [93] the primary judge found that the evidence did not demonstrate that the respondent had "either acted unreasonably or that he ought to have been aware of specific obvious risks whilst wearing ice skating boots and descending the stairs in question". The reference to "specific obvious risks" is to be understood as being to the uneven dimensions of the stairs and to them being wet or moist. He then concluded at [94] that the "defendant has not established its claimed defences of materialisation of an obvious risks or any defence based on s 5F, s 5G or s 5L of the CL Act."
32There are difficulties with this analysis. First, although at [84] the primary judge describes the relevant risk of harm as being or including the risk of slipping or falling when descending the stairs whilst wearing ice skating boots, he does not address whether within s 5F(1) that risk would have been "obvious" to someone in the position of the respondent. Instead, he proceeded upon the basis that although such a risk would have been clearly apparent, the risk in question also involved the uneven dimensions of the stairs and the fact that they were wet. He considered whether that risk was obvious by focussing on whether the respondent had actual or constructive knowledge of either of those matters. The inquiry as to the respondent's actual knowledge of those matters was irrelevant, except to the extent that how he acquired any actual knowledge may have been relevant to the forward looking inquiry as to whether the risk would have been obvious to a reasonable person in the circumstances of the respondent.
33I understand his Honour's reference to "constructive" knowledge to be a shorthand way of referring to the knowledge that a reasonable person in the respondent's position should be taken to have had. In relation to an inquiry as to that knowledge it would be relevant to know whether the respondent had been given any general or specific warning of risk because the fact of such a warning would be a circumstance to be taken into account when considering what would have been obvious to a reasonable person in the position of the respondent. The presence of warning signs was taken into account in this way in Great Lakes Shire Council v Dederer [2006] NSWCA 101; (2006) ATR 81-860 at [155], [167] - [172] (Ipp JA, Handley and Tobias JJA agreeing) and in State of Queensland v Kelly [2014] QCA 27 at [40] (Fraser JA, Philippides and Henry JJ agreeing).
34Secondly, as the appellant submitted, the evidence did not justify a conclusion that the uneven dimensions of the stairs (as distinct from the fact that the length of the skate boot and blade exceeded significantly the length of the tread of each step) or the fact that they were wet, contributed in any material respect to the respondent's slipping and falling.
35The reports of two experts were tendered in evidence - those of Mr Burn and a report of Dr Cooke who was called by the appellant. Although Mr Burn recorded differences in the measurements of the treads and risers of the steps, he did not disagree with the following description of the probable cause of the respondent's accident (Dr Cooke's report dated 19 September 2012) (Blue 119):
"56 The probable cause of the [respondent's] loss of footing is that he overstepped the nosing or that he did not take sufficient care when attempting to descend the Stairs wearing skates. An overstep is one of the most common causes of falls on stairs. ...
57 Thus, in an overstepping accident the front foot may be felt to slip over the nosing but the cause is inadequate support for the ball of the foot, not inadequate slip resistance of the tread surface."
36In his second report (dated 12 November 2012), which was in response to Dr Cooke's report, Mr Burn said (Blue 95-96):
"As observed previously the length of the skate blade exceeds the stair tread going so the ball of the foot (load point when descending stairs) is at or beyond the edge of the stair nosing when adopting a normal gait with feet placed perpendicular to nosing. With the current length goings any adult wearing skated [sic] down the steps will effectively be 'over stepping' as they descend the steps unless they 'duck walk' down (an unnatural gait).
. . .
2.0 Conclusions
The stairs leading to the ice rink are of a size and geometry considered safe for people wearing normal footwear. Skates have a single blade running lengthwise that is longer than normal footwear which changes where the underfoot contact point is situated pushing it forward from where foot/stair contact would normally occur.
Without adopting an awkward 'duck step' type gait overstepping will occur for skate wearers on stairs built for wearers of normal footwear."
37Neither of the experts gave oral evidence. The effect of Dr Cooke's evidence and Mr Burn's agreement with that evidence as to the probable cause of the respondent's fall is twofold. First, the fact that the dimensions of the stairs varied slightly played no part in his overstepping. Secondly, where overstepping occurs the cause is inadequate support for the ball of the foot and not inadequate slip resistance of the tread surface or nosing, whether it is dry or wet.
38The third difficulty with the primary judge's analysis concerns his conclusion that it had not been shown that the respondent ought to have been aware that the stairs were wet or likely to be wet. That conclusion, understood as implying that a reasonable person in the respondent's position would not have appreciated that likelihood, was not justified on the evidence and was to some extent inconsistent with the primary judge's findings as to the foreseeability of the risk of harm from the appellant's perspective. That evidence included closed circuit television video showing people walking up the stairs from the ice rink in skating boots - both immediately before and after the respondent's accident. Although this was the respondent's first visit to the appellant's rink, after he had put on his skating boots, he stood at the top of the stairs and had sufficient time to see that the stairs were being used in that way. That being the position, the primary judge's observation at [131] as to it being foreseeable that the area of the steps could become moist or wet through contact with wet ice skate blades equally justified a conclusion that it would have been readily apparent to a reasonable person in the respondent's position that the stairs were or were likely to be wet and, for that reason, perhaps more slippery than they might have been if dry.
39These errors make it necessary for this Court to consider the question of "obvious risk". The risk of harm which materialised and caused the respondent's injury was that of slipping and falling whilst descending the stairs in skate boots. There were, on the evidence, two conditions or circumstances which gave rise to that risk. The first was, as the primary judge accepted at [84], that the activity of descending stairs carries an "ever-present" risk of falling because of overstepping or losing balance. The second was that the respondent was wearing ice skates which meant that the blade of the skate was all that was in contact with the floor or stair surface. That was likely to affect adversely the respondent's stability or balance. More significantly, because the length of the skate blade exceeded the length of the stair tread, the full length of the blade could not be placed on the tread unless it was placed at an angle to the direction in which the stairs were facing. This meant, as Mr Burn accepted in his second report, that unless an adult wearing skate boots adopted the 'duck walk' over stepping would occur resulting in a fall.
40The respondent was 18 years of age. He was not familiar with the appellant's ice rink and was a relatively inexperienced skater. He was wearing a size 13 skate boot, the blade of which was significantly longer than the tread of any of the stairs. It would have been apparent to a person in his position that the risk of falling when walking down the stairs was significantly heightened by the fact that he was wearing skating boots. His only contact with the surface of the stairs was with the skate blade, making it more difficult for him to maintain his balance, and that blade was much longer than ordinary shoes and longer than the stair treads. Each of those matters also was readily apparent. In addition the fact that there were balancing and other difficulties in descending the stairs in those boots was easily observed from the actions of the patrons who descended whilst the respondent was standing at the top of the stairs.
41The primary judge erred in not finding that the risk of harm was "obvious" within the meaning of s 5F. That is the position, irrespective of whether the relevant risk is described as including that of slipping and falling on stairs that are or are likely to be wet.
42This conclusion makes it necessary to address whether, as the appellant contends, the breaches of duty which the primary judge found were of a duty "to warn of an obvious risk" within s 5H(1). If they were there was no such duty.