Working on the DVD booklet gave me the opportunity to look at the first episode closely. Usually when I watch anime, I am doing something else (working or reading manga), so I never really pay close attention. I especially don't pay attention to the first episode.
I do that with movies too. I don't really pay attention (unless I'm at a movie theater with no distractions) until 2/3 into the movie.
So every time the DVD booklet points something out, I'm like, "Really?" So I keep fast forwarding to the part to check it out.
One thing I discovered that was creepy...
[spoiler? alert] In the beginning where young Lelouch and Suzaku are climbing a slope, you see C.C. watching them. It's interesting that her clothes matches the sunflowers she is standing next to.