@PointsNorth, I don't know how else to describe it. When I wake with B12 symptoms in the night, they usually manifest as tense / twitching muscles -- impossible to relax them -- sometimes escalating to full-body thrashing that I really can't control, at least not in my half-awake state. I also tend to be agitated and upset, partly just because the @#%@#!! stuff is driving me crazy (similar to RLS-type crazy-making) and ruining another night of sleep, but the agitation itself also seems to be a symptom of the B12-deficiency reaction. When I'm in that state I obviously can't fall asleep, but often I'll be so groggy that I'm not entirely awake either -- and it is literally nightmarish. I think at times I've fallen into fitful sleep and had actual nightmares about how nasty it felt when I was trying to fall asleep. In 2013 before I discovered B12, I was spending 3-5 hours nearly every night in a semi-conscious daze, thrashing and tearing the bed apart. It sucked bigtime and it meant I was getting almost no restful sleep. And generally the next day I'd feel like $#|+, more than just sleep deprivation. It was like a B12-deficiency hangover. Thank God for B12. When I was waking in the night, I could take a Country Life 5mg or a shot or two of Readisorb, and I would get this almost-instant "ahhhhhhh" reaction. My muscles would relax and stop twitching within a minute or three, and next thing I knew it was the next morning. But I haven't had to deal with that much lately. The B12 oil seems to be doing a pretty good job of keeping my serum B12 levels high enough, steadily enough, that I very seldom wake with symptoms now.