1 Minor (Maybe a bit major) mistake
The stick gets the grenades thrown at him and he takes the grenade thrown at him second and throws it back first when in real life if he threw that one back first the other one would have blown him up right in the face. Other than that this has to be one of the smoothest animations I have ever seen in my life. Sticks aren't very good graphics, but Zhu makes them look good by adding 3d effects beyond imaginable.