Whilst your eyes might see it, what you percieve is something else. Even looking for something in particular you brain may decide to ignore it...mine does when I'm looking for my keys for example
I know perception is a bugger - I've spent ages looking for tools that I was already holding in my hand. I would argue though that his change of direction appeared very intended, as with the stop on the RIF. Adding things together and I feel it not unreasonable to surmise that he was being a cnut in a number of different possible perceptions of the incident. We know he did it. So it comes down to intent, or not.
I find it very very hard to accept he did not realise he did it (by mistake), so the cnut charge stands because he didn't come forward for reasons above (the ground and roots just don't feel the same as a RIF no matter how you cut it) and say "sorry dude I didn't see it on the floor - is it OK?".
I find the way he changed direction, moved, stopped and moved on to be very deliberate - and that's before we take into account the fact that that gun looked nothing like its surroundings - which were more or less bare earth and a few small, light grey/brown twigs. A socking great big, green, M14 and scope would be pretty obvious.
However - the silly sausage that owned it shouldn't have left it like that.... I had a bit a WTF moment when I saw how he left it in the building at the start of the video... Initially I thought that was the incident in question until i saw the timestamp.
Just my view on a three year old incident... Now as the other poster said in that thread - can we get back to talking about how fricking awesome I am?