Lucid Dreaming - A useful skill?

I rarely have LD dreams, but when i do, they are odd...

I was coming out of my bedroom door into the living room at my fathers house. I looked around and realized that my half-sister was watching tv, but it was different, it was a movie, a movie she watched yesterday. I asked her why she was watching it again and she looked at me weird like i was crazy. "I just got this yesterday..." i kinda let out a "huh" as i stared at the TV. I then realized that this was either Dajavoo or something similar. The first thing i did was check the date but it was the yesterday, then i thought...it was yesterday, yesterday right?

It took me a while but i realized that i was dreaming, and instead of just trying to wake up, i wanted to do all the things i couldn't do in RL. So, first i went into the living room and started snapping all the CD's for PS2 games that were my half-sisters since she has like a million more than me. She started to get upset and ran crying then my father came out, i stood, punched him in the face and threw the broken CD's at his unconscious body. Then my step mother came in and i just looked at her smiling and she ran with my half-sister.

I then went outside but the worse part was that it was a floating house, nothing. No lawn, no sidewalk, no street or other houses. So i went back inside, looked at the mess and could hear the sounds of screaming from my step mother and half-sister and i got tired of it so i looked at the black nothingness outside and ran from my living room to outside and jumped off the edge plummeting towards a black pit until i awoke at my bedroom at my fathers house

i walked out and i saw the TV my half-sister was watching, but it was some cartoon, i made a sigh in relief and everyone just looked at me weird, i just said "It was a long night"

Jam it back in, in the dark.