The relevant evidence
21The respondent's evidence was given orally. Relevantly, his evidence in chief may be summarised as follows:
(a) When Mr Whitehead lifted the chute after the blockage had been cleared in order to reconnect it to the chipper, it was unbalanced and swaying around. Mr Whitehead then slowly drove the loader forwards towards the chipper to a point where the chute was located approximately one metre above the chipper. He then lowered it down but due to the fact that it was swaying around he was unable to get it to line up properly with the sleeve.
(b) In the course of his attempt to align the chute with the sleeve, Mr Whitehead moved the tines forwards and backwards, his intention being to manoeuvre the chute over the top of the chipper.
(c) He then lowered the chute in a manner which enabled it to be connected to the sleeve but the connection was not complete.
(d) Mr Whitehead was getting stressed and then instructed the respondent and his co-workers to mount the chipper and grab hold of the chute, presumably to guide it into a position where it was fully aligned with the sleeve. He continued to slowly drive the loader forward, moving the tines forwards and backwards in an attempt to line up the chute with the sleeve.
(e) The respondent then tapped the chute with the sledgehammer and then stood back, noting that Mr Whitehead was still moving the tines forwards and backwards. The chute then swung around and knocked him off the chipper.
(f) The following exchange occurred:
Q. Right. What was the forklift (sic) doing at the time if anything, at the time that it swung around and knocked you off?
A. Moving the forks forward and backwards.
...
Q. Is it your evidence that the forks were moving forward and backwards at the time that you fell off, is that what you're saying?
A. Yeah.
22The respondent's evidence in cross-examination was to the following effect:
(a) When the chute was suspended over the sleeve it was swaying (presumably because it was suspended from the tines of the loader by the chain). It was then lowered so that it was partially, but not completely, over the sleeve.
(b) Although one end of the chute was partially connected to the sleeve, the chute was still "rocking around" on the chain. It was at that point that Mr Whitehead instructed the respondent to get up onto the chipper.
(c) Although it was suggested to the respondent that the loader at the time of the accident was stationary, he denied that that was so. When it was suggested to him that he did not see the loader moving he responded: "I actually did see the loader moving."
(d) With respect to him carrying out Mr Whitehead's instructions to try and manoeuvre the chute onto the sleeve, the respondent's evidence in cross-examination was as follows:
Q. And you were given a hammer, that right?
A. Yes.
Q. Where did you hit it?
A. At the bottom where it - where it slides over on the coupling.
Q. And when you hit it, it swung back at you, is that correct, is that what happened or don't you remember?
A. Yeah, it all happened that quick, I'm not actually sure. I don't think it swung back straight away as soon as I hit it.
Q. But you're in no doubt that it hit you and knocked you off the chipper?
A. Yeah.
Q. You said you stepped back, you didn't just miss your step?
A. No, no, it hit me, really I shouldn't have even been up there.
(e) Again it was suggested to the respondent that whilst he was standing on the chipper the loader was not moving but was stationary, a proposition which he denied.
23The following exchange took place in re-examination:
Q. When you tapped the chute, did the chute discharge or did it remain there?
A. It stayed there.
Q. So it wasn't until you moved back that it came out and slung round?
A. Yes.
24Evidence was given by the respondent's brother, Wayne, and by Mr Dorset, but in my opinion that evidence did not really assist the primary judge, a proposition with which the respondent generally agreed.
25Mr Whitehead's evidence comprised both a written statement as well as oral evidence. In his written statement dated 3 July 2009 provided by him to a workers compensation investigator, he stated the following:
18) When the chipper blocks it is sometimes necessary to remove the main distribution chute from the chipper in order to clear the blockage. On the day of this accident that is exactly what we had to do. I was driving the articulated front end loader owned by Blayney Treated Pine. There is a hitching point on the chute of the chipper and we had attached a chain to the hitch. I then lifted the chute clear of the top of the chipper. After clearing the blockage we were then in the process of refitting the chute to the top of the chipper. The chute is very heavy and made of heavy gauge steel. With the front end loader I had positioned the chute over the fixing points of the chipper outlet and was trying to get the chute in a position so that the securing bolts could be fastened.
19) We were having some trouble aligning the chute over the pipe in top of the chipper. The claimant then climbed up onto the chipper at a height of about 1.5 metres off the ground to guide the chute into place over the out feed pipe of the chipper. The front end loader was at that time stationary and I was seated in the driver seat. The chute was almost in the correct position but needed to be taped with a sledge hammer. The claimant while standing on the top of the chipper used a sledge to tap the chute. I kept the front end loader stationary and it was out of gear and the hand brake was engaged and the hydraulic locking device was also engaged at that time. The claimant then hit the chute with the hammer and the chute moved suddenly back towards the claimant and hit him very hard. The chute had only moved a distance of about a metre but it was a very heavy item. The force of the impact with the claimant knocked him off the chipper and fell onto ground again that was a fall of about 1 to 1.5 meters.
26Although the primary judge considered that Mr Whitehead's oral evidence was in direct conflict with his statement in paragraph 18 that he lifted the chute clear of the chipper (for the purpose of removing the chute to enable the blockage to be removed), the critical part of Mr Whitehead's evidence is that contained in paragraph 19.
27If accepted, Mr Whitehead's evidence in paragraph 19 was that at the time the respondent hit the chute with the hammer the loader was stationary, out of gear, the hand brake engaged and the hydraulic locking device also engaged. In other words, it and all its relevant parts were stationary. The chute was suspended by the chain from the tines and was partially connected to the sleeve but it was only when the chute was hit with the hammer by the respondent that it moved suddenly back towards the respondent and struck him, knocking him to the ground. In other words, had that evidence been accepted, on one view of it the operation of the loader had ceased and the separation of the chute from the sleeve was due solely to it being hit by the respondent with the hammer in accordance with the instruction that Mr Whitehead had given him.
28However, as the primary judge noted, in cross-examination Mr Whitehead made a number of concessions. His evidence may be summarised thus:
(a) For the loader to move in a forward or backward direction it is necessary for the driver to use the accelerator. Unless the accelerator is depressed the loader remains stationary although the articulated front section containing the bucket, or in the present case the tines, can be moved in various directions by a lever in the driver's cabin. It can be moved up and down or tilted and moved laterally by use of the steering wheel. Apart from the use of the steering wheel to move the tines in a lateral direction all other manoeuvres of the tines are caused by the use of the joy-stick in the driver's cabin. In order to enable the tines to be moved the loader's motor has to be running but there is a hydraulic pump attached to the motor that moves the tines in various directions (other than laterally).
(b) When the chute is properly in position it slides down the sleeve for a distance of between four and six inches. It would appear that it is then locked into position. However, when the chute is separated from the sleeve, due to its weight it takes a deal of skill to manoeuvre it so that the end of the chute fits fully over the sleeve.
(c) In order to align the end of the chute with the sleeve it was thus necessary to utilise the manoeuvrability of the tines in order manipulate the chute into its correct position.
(d) Just before the chute became separated from the sleeve and knocked the respondent over it was partially connected to the sleeve although its weight was being taken by the chain attached to the tines of the loader. Mr Whitehead accepted that he would not have slackened off or released the chute until it had become fully coupled with the sleeve.
(e) The reason he instructed the respondent to use a sledgehammer was so as to create a relatively tiny movement between the chute and the sleeve so that they came into alignment. He accepted that it was necessary to ensure that the chute was perfectly aligned with the sleeve to enable a proper connection to be achieved. He further accepted that he had to "minutely manipulate" the chute attached to the loader to enable alignment to occur. However, in order to obtain the necessary alignment the operator of the loader needed to use all its manoeuvrability to jiggle the chute so that it became aligned with and moved down the sleeve. However, when asked whether that is what he was doing at the time that the chute "discharged and swung around and hit" the respondent, his answer was "No".
(f) However, after agreeing that the loader was at all times taking the weight of the chute, the following exchange occurred:
Q. If that is the case for Mr Lowe to tap the side of the shaft would have no effect whatsoever because it wouldn't lower?
A. That's right but it had to line up a little bit better than that.
Q. That's not right, is it, the reality is this, that it was all happening at the one time in a very short period of time which required not only tapping of the shaft but the manoeuvring of the shaft using the front end loader, that's correct, isn't it?
A. Yes.
Q. And that includes the steering wheel moving the front wheels to get the lateral movement of the forks and thereby moving the shaft in a lateral movement, so you're jiggling it all around, aren't you, to try and get this move down the shaft?
A. Yes, originally.
Q. Well you, had to continue that because it hadn't moved all the way down the shaft, didn't you?
A. That's right, yes.
Q. So what I say is correct, is it not, that whether you were doing it at the very moment that the shaft discharged, within microseconds of that point of time you were going to jiggle it around to get it to move down the residual shaft attached to the woodchip machine, you agree with that, don't you?
A. Yes.
(g) The cross-examiner then suggested to Mr Whitehead that he needed all the manoeuvrability of the loader for the purpose of bringing the chute into perfect alignment with the sleeve. The following exchange then occurred:
Q. And the only way to get it to jiggle down the shaft is to create a jiggling of the shaft by manoeuvring the front end loader?
A. That is one way, yes.
Q. Well that is the only way, is it not?
A. No, I got Anthony to give it a tap to see if it would lower.
(h) Mr Whitehead then accepted that the chute would not move until he first of all lowered the tines. He was then asked the following:
Q. So you have got to lower the tines at least and if you felt that the impediment to the movement of the shaft down onto the residual shaft was a lateral problem you would jiggle the steering wheel for greater movement left and right, that's correct, isn't it?
A. Yes that is correct.
It is apparent from this question that it was couched in theoretical terms. The cross-examiner did not directly put to Mr Whitehead that he was jiggling the steering wheel at the time that the respondent was tapping the chute in order to attempt to re-align it.
(i) However, the following exchange then followed:
Q. We have agreed, have we not, that just prior to the shaft swinging around, hitting Mr Lowe it was partially connected to the residual shaft of the woodchip machine?
A. Yes.
...
Q. What I want to put to you is that the only way that it could of discharged from its connection is by movement of the chain connected to the forklift?
A. Yes.
(j) Finally, Mr Whitehead stated that once he had got the chute into position he stopped everything and then called to the respondent to "give it a tap". The following exchange then occurred:
Q. And you do agree with me, do you not, that just moments before he tapped it you were using all the manoeuvrability of the machine to get it to that position?
A. Yes.
...
Q. Which includes the use of the front wheels to give lateral movement to the shaft, you agree with that?
A. Yes, if it wasn't in position at the time.
...
Q. It wasn't in position, that is the shaft was not in position until just before Mr Lowe got up to tap it?
A. Yes.
Q. So up to that point of time you were using the tines and the front wheels of the machine to put it into position?
A. Yes.
Q. And in order for it to be effectively tapped into position, it is necessary for you as the front end loader operator to lower the forks of the front end loader about the same time?
A. Yes.
29As I have indicated, the respondent's case was that either at the same time or immediately following the respondent tapping the chute with the sledgehammer, Mr Whitehead intentionally raised the tines of the loader which caused the chute to separate from the sleeve thus permitting it to swing freely and strike the respondent. There is some support for that case in the last question and answer referred to at [28(i)] above. On the other hand, the respondent's case is inconsistent with the last answer referred to at [28(j)] above where the cross-examiner specifically suggested that in order for the chute to be effectively tapped into position it was necessary for Mr Whitehead as the loader operator to lower (as distinct from raising) the tines of the loader at the same time. That question is inconsistent with the respondent's case on the appeal that Mr Whitehead lifted the chute in an upwards direction. In his written submissions at trial the respondent submitted that the only inference that could be drawn from the facts was that Mr Whitehead's actions whilst driving the loader
must have moved the chute causing it to dislodge from the woodchip machine and swing around and strike [the respondent].