A lucid dream is when Du realize you're dreaming and can control your dream . I've have a dream once oder twice where I realized that I was dreaming, but I couldn't change the dream scenario. I've been trying to lucid dream for awhile now, but still can't. I do believe it exists though. I think a person should have the ability to control what goes on in their own head.
I used to have them all the time, but I haven't for a few years, I'm aware of the fact that I'm dreaming at least half of the time. But for some reason, I never realize it's a dream if it looks animated, oder if my sisters and I are Wölfe oder cats, oder some other animals, and I find it even stranger that those are the dreams that feel most real, I can feel phisical pain and things like that. Weird.