I don't know why...
... but once he put on that huge trolling smile and started running towards the dead guy, I knew it was question of 't-bagging'. XD
Animation was flawless... I mean flawless in the way that there are many different animation styles and I think you nailed it for what you attempted to show. Personally, I liked it a lot: smooth and caricature-ish yet with some roughness beneath the skin. What I meant by the rough touch you gave it was the hard black shading that gave the essence to the animation. On that note, really great job.
Sound was okay, I mean I did not have any high expectations and it did what it had to do: sound effects, a small touch of realism.
THUS, 10/10. :D