Somehow, you keep outdoing yourself. As far as light, I always knew it had mass, even before I met a well thought science teacher (who loved to thrash the physics teachers). It takes a certain philosophy to practice science, and I'd say the subject of your piece, is what has been missing.
I certainly hope all the math geeks in the NG BBS take the time to view this episode, and seriously consider this. Props to Tony for such smooth and compelling VFX