There is one moment where something slightly unnatural happens in your performance though, and that is when you push the ribbon down at around 54 seconds into the video. The left box (as viewed) then moves instead of just the ribbon. It's a bit hard to explain that just from ribbon friction.
![Smile :-)](./images/smilies/icon_e_smile.gif)
But I guess you also noticed that, and we both know why it happens.
![Smile :-)](./images/smilies/icon_e_smile.gif)