What you see is exactly what you see.
It's possible he was already dead before they cut his head off though, that would explain the lack of blood, and due to the blurring in the film, that would suggest an edit between the first shot (filmed earlier where he would be alive) to them pulling him over (when dead) and then the removal of the head.
Let's face it, if you're going to cut someone's head off for shock value, you're not going to want to be sprayed with their blood whilst doing it.
