Have you ever had a "Lucid Dream"?

i had one when i fell aslepp but could feel everything and i new it was a dream heres the freaky bit i woke up sitting on the sofa with my parents looked on my body there where cuts but they didnt even see me move i dreamt about my teacher killing me and i get the scars in real life and dd not move whats up with that did they cut myself from the inside its wierd huh