A lucid dreamis a dream in which the person is aware that they are dreaming while the dream is in progress, also known as a conscious dream. When the dreamer is lucid, they can actively participate in and often manipulate the imaginary experiences in the dream environment. Lucid dreams can be extremely real and vivid depending on a person’s level of self-awareness during the lucid dream.

I managed to have lucid dreams several years ago. My dreams were some kind of video tape, where I could rewind and fix those parts I didn’t like. Didn’t know there is a machine which can make you have lucid dreams. Dunno if it works, what do you think?