When the red guy lands on the bookshelf, there should be a slight bounce, and more limpness to him. I thought he was just sitting because of how stiff he was, but it looked like later on, he was already defeated. It would have made the lines, "Ready for round 2?" even better, because it would be clear that the blue guy is going to over kill his opponent who is unable to fight anymore. It would have shown how much anger Blue had. Also, the ending is a bit abrupt.