A waking nightmare, the other morning:

I wake up mid-morning and can't move, and I glance up and to my upper left standing over my bed there's a dark figure, and I feel utter malevolence.

I close my eyes and pray prayers of exorcism, and after several minutes, I can move again.

Then, although I'm agitated, I eventually fall asleep.

When I get up several hours later, it's like I'm in a different reality and that what happened earlier was just some kind of dream, though I can see how a reflection in my mirror might have appeared like a person to me, earlier.

The terror was real when I felt it, though.