Alterations when filming
we had to make some changes when filming, in regards to some of the shots we initially intended to use, for example, we set out to end the opening sequence with a 360 degree shot of the woods with only the one character standing there, however during filming we found this to be very challenging as the terrain of the woods was not smooth and therefore gave the effect of 'shakey' camera work. 
Another major change in our opening sequence was adding in a flash back, this was partly because our footage was not quite long enough and lacked in a range of shots, but also to try and give the audience a clearer understanding of what's going on, as a back story.