Ah Ive had black-outs before where Ive got up after being stationary for too long and collapsed on the floor, not often, its only happened half a dozen times I think, but never have I felt sick!
My circulation is so screwed up, I get pins and needles so easily. Ive hit myself in the face at night before when my arm was dead and I didnt know and raised my arm to see the time. Often I also get up to make it halfway down the stairs before one of my legs decides to die and then the stairs become a whole new board game