I really like that animation! One thing that bothers me though, is the part where his head falls down. The un-splattered area behind him doesn't really work for me, and looks more like a paper cutout. This is because if blood were to go everywhere like that, but not behind his head, it would mean the blood was splattered from infront of him, and therefore his face would be covered aswel.. i guess. Also there is no spillage there either.
Also, might look cooler if his head fell face down.
Wh00t, coool though.