I had a dream at first that I was looking at myself in the mirror but it was like a younger version of myself, like maybe when I was in my teens (I'm 22 now) and then I turned around and saw a door open to a hallway that had green walls, and I remember thinking that this was real. But before I had a chance to go out into the hallway I was too afraid because I think I realized the hallway lead to a dream in which I could control whatever was I going on.

I wonder if you can transition from a regular dream to a lucid dream or if most people just go right into a lucid dream.