In the psychology subfield of oneirology, a lucid dream is a type of dream wherein a person that is dreaming realizes that they are dreaming during their dream. The capacity to have lucid dreams is a trainable cognitive skill. During a lucid dream, the dreamer may gain some amount of volitional control over the dream characters, narrative, or...
I've had at least 2 of these before, they were kinda cool but honestly fell short of my expectations. Maybe if I were to get better at it I would enjoy them more?