My experiences with lucid dreaming have been a mixed blessing. It was shortly after that I began to come across articles on the subject. This would only work if you smoke and carry a cigarette case but the obvious notion being that if you smoke a pack a day then you will see this 20 times a day and you should do a reality check every time you see it. Anything you do habitually in waking life you are likely to mimic in your dreams. This and on other occasions I've had varying degrees of success with the play on habitual behaviour.
Many people experience it.
It happens in that twilight world between being fully awake and fully asleep. For a few minutes, maybe longer, you're immobile and acutely anxious. You feel a weight on your chest as if some being is sitting or lying there. Your heartbeat is quick, Your breathing labored. You may experience auditory or visual hallucinations of people, demons, ghost, animals, or birds.