If you watch the videos, you'll see there are two cameras so each load is filmed from the front (cam1) and top down (cam2). From those images that chris posted, these are the loads in action:
Load 1:
Load 2:
So as you can see, no fake pump thing under the penis.. just guys actually cumming on Taya. There were many guys who attended bukkakes, around 50-100 so there's no way it would make any sense to fake things if you're going to actually have that many guys! I understand there is a lot of trickery in parts of the industry but Torbe's work falls into the 50% of real cum shots in porn
Fake cum is easy to spot, it all looks the same whereas the real stuff is all sorts of colours and textures. Good example is Alma's video from Premiumbukkake where she swallows 6 mouthfuls of 10 and they all look quite different:
Dear members of the jury, I declare this case closed