NOTE: All that follows is meant to be constructive. Any criticism of creative output stings, and feels like a vicious attack. I've been on the receiving end, and it's no fun, even if you've asked for it.
Here we go.
[adjusts Shalit Movi-Spex(tm) and pastes on Official Tarantino Funni-Patch(tm) Facefuzz]
The departure of the head from the shoulders is convincing, although it's all very dark (not necessarily a bad thing, and less so on a screen more than 3 inches across

). Once the head's loose, the trajectory is a bit of a problem-- it's like the bugger's on a rocket. While 100% realism isn't hugely exciting, if the physics are a little closer to what we live with, it'll be all the more convincing. I know there's some dojo sites online with tameshigiri practice videos, which could be useful references. Finally, that red-shirt chap who shows up to get kicked kind of muddies the scene; I'm not quite sure what to do about it other than adjust the camera placement (with the attendant pain-in-bum of reshooting), but as it stands it's a bit like one of the crew stood up before cut was called and gets a boot to the head for getting into frame. Of course, if there's a previous shot establishing where he's coming from, that's a non-issue.
It should be quite the spectacle when the gore's processed in.
