LOL! I had the same experience with your avatar Ella! I was totally wondering if it really moved, or if I just imagined it! I waited and waited, praying it would move again, to reassure myself I didn't imagine it! :roflhard:
I agree with the advice here on slipping the first stitch. Some folks prefer to just work that edge stitch tightly, without slipping. You can do either way, it's just personal preference. I'm a "slipper." My habit is to slip it k-wise (knit-wise, putting the needle in as if to knit to transfer it) on knit rows, and p-wise on purl rows, and just work the last stitch however you do for that row.
You can slip or not slip the first stitch when doing a garter edge as Ella suggested.
Some folks prefer non-slipped edges if they're going to be seaming the edge (like for side-seams on a sweater).