You're close, it's an AWACS.
I've actually had dreams like that before. They creep the hell out of me. Usually in that type of dream, I think I'm lying in my bed, and I look over into the corner of my room, and there's something there; one time there was a huge guy facing into the corner, and he wouldn't move; another time, a couple days ago actually, all the blankets on my bed were standing up on their own and "looking" at me. During this type of dream, I think I'm awake, but I can't move, can't talk, even though I try to. I think I'm mouthing the words, but they won't come out, and I'm moving in very slow motion.
As far as I know, they're fairly normal to have, it usually just means you're under a lot of stress so you're not sleeping well. When you have a dream like this, you're fairly lucid (which means you realize to some extent that you're dreaming, and can therefore control it), but you really have to think about it. If it happens again, try thinking about the dream that you're in as hard as you can. Shut your eyes very tightly, tell yourself, "Oh, I was just dreaming," and then open them again. You will either wake up or fall asleep completely. Works for me anyway.
This type of dream is SO SCARY THOUGH.