Nasty
Happened to me a couple of times when I was over stressed at work and sleeping on a very uncomfortable sofa bed. In mine I saw a bright light outside the window opposite my bed and there was a noise like rushing water which turned into what sounded like a huge engine starting (sort of like the enterprise going up to warp in the original star trek). It got louder and louder and I felt like I was being charged up with energy to be accelerated out my window at ludicrous speed. Just when I thought I couldn't take any more I passed out again.

I'd read about sleep terrors before this happened, so I knew what it was but it was still utterly terrifying.

Still doesn't explain the sore arse the next morning and the fact that now on clear nights I can hear the transmissions from orbiting satellites in my head.
( pixel_fucker is going to need a bigger brush, Sun 10 Apr 2011, 10:46, Reply)