I've encountered something like this when the fear and doubt takes over and it was quite an annoying block for a few trips. Calming the adrenaline before going in helps. It basically manifests occasionally once any hint of doubt, fear, and anxiety about what is going to happen while in the come up is allowed to grow and take over my mind, then im stuck in a loop staring at this thing until i let go. During one breakthrough a jester was going about showing me some machinery at that film-fast-forward speed of hyperspace when I suddenly thought of that weird object while simultaneously questioning this beings intentions. In the instant the thought occurred the being came at me with this "collage of hands"- as you said, which i think describes it pretty well since it appeared to simply be moving its hands around at light speed in front of itself so fast it looked as though he had an actual object in his hands. So it came at me doing this and then went back to what it was doing in the blink of an eye and the overall vibe was that it was a joke to say "calm down you paranoid monkey. Relax, I'm not out to get you. There is no reason for fear here"
"what is this thing and why is it soo scary to me.... im left with more questions than answers."
Thats normal! There is usually more questions acquired than answers from a dmt trip
As for the fear, try thoroughly relaxing before hand..focus on letting go of it and giving into the experience. You can't remain in fear of the unknown, just gotta let go the need to know. Pump love through your cells! It works!
<Ringworm>hehehe, it's all fun and games till someone loses an "I"