That's pretty good man. I really dig it, you can really feel the rising level of the guy's frustration. The facial expressions also came out really well. Shame about the sound, it doesnt bother me much, used to doing things without it, but I can see how it would've added much more to the complete piece.
Just a nitpick though, but when he slams on the keyboard, it just comes to a complete stop. Maybe adding a very light up-and-down movement on the body would make it less static. That's really my only problem.
Good stuff man.