Screaming or howling

Of all the times I have had a lucid dream, this one was actually induced by a nightmare. I will start from the regular dream first. I was at my grandmother's house with my sister (<PERSON>) and we were playing some video game system in the backyard on a projection screen. For some reason, there was a piano in view 10 yards in front of where we were playing. While we were playing some game, an unknown being had struck three chords on the piano. My first thought that it was a ghost because <PERSON> and I have had a paranormal experience where a piano has played on its own. I tell her "turn off the game do not acknowledge it at all let us just go to the porch." So it was like we had not heard the noise but we put our heads down as we walk to the porch where there are other people talking about what had just happened. At this point I am spooked and am only thinking about ghosts. I walk inside to find I am in my living room by myself. My family owns this big clanky television that has a glare when it is off, so I walk up to the screen and all of the sudden I see a black shadow of a person behind me in the reflection. I scream and turn around to find I am now lucid because I think that there is no way this could happen. I scream and run around the black shadow as I look at my hands and realize how vivid they are. Outside is now my actual backyard and I run around to the side of my house where my drive way is and I run up it. My only intention was to get away from the shadow, so now I have nothing to do as my dream starts to fade. It turns to black but I can tell I am still in some dream state.After that I woke up panting in the dark. One of my problems is that there are plenty of times when I am in this state of darkness but still dreaming, and I just need to find a way to visualize the next place to go with the next dream.