There isn't really such thing as the "beginning" of a lucid dream, because once you know that you're dreaming, you're already lucid. Like Toozul said, it's a lucid if you were aware that you were dreaming; you could have been super-aware or more passively aware, but as long as you were mentally conscious on some level. A lucid dream is the same as a normal one except that you're aware, so it can essentially consist of anything - it could be it a nightmare, an unstable dream, or anything else! 
You may have heard about your friend's experience and unconsciously associated his own experience with all first lucids, so you also had the dark tunnel and noise. But everyone's dreams are different; my first lucid occurred in my house, without any weird events or anything. It was probably just a coincidence or the fact that you heard about it the other day.
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