I had interesting dreams last night. The first dream was rather abstract and in the third person, involving a guy escaping from the loony bin, going round blowing stuff up with large guns while trying not to get caught, and finally dying after coming across somebody with a grenade launcher. (My dreams aren't usually this violent, honest!)
Then, as dreams are sometimes wont to do, it repeated along slightly different lines... this time it was more obviously myself, and I was at least trying not to kill anybody as I blew stuff up. As it neared the part where the character died in the first dream, I noticed the similarity and realised that I was going to die at this point. (Eek). I was blown up as before, but upon continuing to exist, I realised that I was dreaming, forcibly took control of the dream and altered it.
I had several more dreams, and in each I spotted similarities to the previous dream and managed to take control of it at this point. This is probably the most successful session of lucid dreaming I've had. (Lucid dreams being those where you are aware that you are dreaming.) Anyway, for the interested, here's a basic guide to training yourself to gain lucidity:( Lucid dream HOWTO )
Finally, on a rather silly note, my acquaintance also said that everybody he's met that can lucid dream has a second toe longer than the first. How he figured this out I'll never know. Any counterexamples among you lot?