Any time I crash at a friend's, if I need to sleep on the couch... My right arm goes dead. And not just the tingly little "ow, ow, ow" of an asleep arm, oh no, much worse. I wake up, try to move the damn thing, and due to absolutely no blood getting into it, it won't move. Hell, I have to shake my arm up and down, generally making the muscles move for themselves to get it into a tingly ow ow ow moment so i can start moving it again. Since it happens so often now (almost anytime I have to sleep on a couch) it's not quite so freaky, but still, every time it happens I'm just a wee bit scared it's too late to save the arm again. Maybe irrational, but still kinda scary
There's also the days I wake up, and look at the alarm, and basicly say "Goddamnit, not again!" seeing as I've either slept through my alarm or got up, turned it AND the phone off, gone back to bed, and can't remember a second of it. (Surprisingly, this happens quite often, and for the life of me I still am not sure which one really happens)
The only other one I can think of was waking up and realising I had I think it was 30 minutes to get to work, and work was about 35 minutes away.