I really love the live animations, and that they don't start until you scroll to them. However as I was reading I found myself deliberately keeping very close to the bottom of the page so that I didn't trigger an animation too early and have to split my attention between it and the text. A hover-to-start function, or a pause button, would have been even better in my opinion.

Just a bit of feedback in case you're thinking of doing similar articles in the future, which I hope you are, because this was fantastic.