Punch your wife!!!! That hilarious!!!! Hope you can control your body a bit better when the time comes...

I can wake myself up from LD's too, my problem is actually to retain them...

Just as seeker said, I have only done it once, long long ago before I knew what lucid dreaming even was, and I wouldn't do it again. If you are in a lucid nightmare there are much more things you can do, rather than wake up. Try spinning, or better yet confronting whatever it is that is antagonizing you...