Surprisingly most of my lucid dreams have been DEILDs, but they only happen when I have nightmares (save a few exceptions). What will happen is I'll instinctively wake myself up, realize that I was dreaming, and re-enter to get some payback on whatever the nightmare was. That's my most common anyway, and I almost never do it on purpose, so to speak. As for zombie apocalypses, I've lived through so many I've become accustomed to them. I once became lucid just because I was in a zombie apocalypse, thinking to myself, "Wow, another zombie apocalypse? Can't my brain think of anything original anymore?" After having literally around 40 dreams about them, even my dream self isn't dumb enough to be fooled. However apparently he's foolish enough to think guys can get pregnant. >.>