Anyone ever felt like an extremely heavy ball is rolling around your head, just as a ball in a roulette wheel spins? It as if you are fighting to keep your head from moving, rolling around with the weight of it The feeling is a strong centrifical force, and gives you the feeling of moving back and forth. As it happens, it feels as if your brain is seperating and floating away from your head. I had to shut my eyes and just put my head down until it passed. It is not the feeling of the room spinning, but as if your brain is spinning. After it passed, I felt OK.
I wonder if it is a lack of blood to the head or a surge in blood pressure. It doesn't hurt, it just stops you in your tracks and it almost could make you feel sick if it were to go on much longer.