As i explain in the video- Ann just learned how to arch her back and few days after i took this she rolled. We still have yet to get that on video. It just sneaks up on us and she rolling. She thinks it's so funny to arch her back when we are holding her, trying to put her to sleep, and when we are buckling her in the car seat. This new found independence makes our lives a little trickier... but as always we love it!