I guess I was suprised by all the little details I noticed, and how they fit together so well (the lists of threes happen much more often than I first thought), and the fact that I noticed them after walking away from the paper for a while.
The thing I found most difficult was trying to keep it concise and limited. The little things in a particular passage were applicable to so many other ideas found throughout the novel.
i had the same problem and wanted to tie in the supermarket to the airborne toxic events and other scenes throughout the novel that though on the surface they were completely different, they were all eeriely the same.