It's basically like your mind doesn't want you to be Lucid or at least let you know you're dreaming.
That seems to be the case most of the time, but sometimes there are those very special DCs that do want you to know you're dreaming. The few that I've come across were very helpful, if not mysterious and mischievious about it.

Quote Originally Posted by Flycat View Post
LOL, this has happened to me. Also...

It does not want you to be lucid. The reason? Your subconsious wants to show you something in a dream, but you become lucid and manipulate what it tries to teach you just to have fun. Itīs last resort? Lucid Nightmares and FAīs. With nightmares, it will trap you, make you lose control, and get you in a nightmare. If you somehow escape, you get a false awakening, your subconsiousīs last hope. It can also skip the nightmare part, it usually does, but for some people like me it does not. Well, to keep up with what i was saying, it copies the detail as you remember it, and makes it extremely vivid. It also takes the position you are currently on while sleeping (like, if you are sleeping on your left arm, you will "wake up" on your dream left arm in the exact place. Has happened for me), but it does not have a way to counter RCīs, except for repeating FAīs. That is my theory anyway. Heh.
I like that theory. There was a couple of times I've gone lucid and just let the dream take me where it wanted to, because I figured it had something special or important to show me. Something far more enlightening than what I could have done.

Where did it take me?

It took me bowling.