Let me start out by saying that I have never seen an animated reference, but I think it's a great idea.
I love how the it's very smooth and clean, and I like how the lines aren't just black, it's a very pleasant concept.
The only thing that I don't like (tiny little detail, I'm so OCD) is that the legs kind of "break" with the movement, meaning that the lines no longer connect on the downwards motion.
Other than that, I think this is really, REALLY cool.
How do you rate impact on a ref sheet? IDK you get a five.