The only thing that still bothers me, is his jaw and lips seemed to be moving when I first watched it. Then there was no blood spray. Does anyone know how long involuntary spasms continue after death, and what the window is for this and the blood to still flow out after dying?
Imagine you have about 4 full cans of motor oil that you are holding with the tops up in each hand. The tops are off. Then you flip your hands over and pour all the oil out at once. Well, that's about what that looks like. The blood comes out very fast and in a large volume since most of it is in the body and that's where the "pump" is.
This was a hack and slice job, with the victim held down on the carpet. You can see the spreading blood lake. The blood is exiting massively while Berg's head is still roughly in place. By the time the head is taken off, he is mostly exsanguinated, and there is no blood pressure left to cause "guillotine" blood spurting.