I think I know what that is, its when you feel like you are awake but can't get up or move. Horrible feeling. I had that a couple nights ago. I actually slip into dreaming again because I cannot switch off...I thought I was sleeping on the couch and I was but it is a bit like your dreaming, yet for me I dream I am getting up and ready to go for the day. I get back to dreaming though because I woke up with a nightmare...