LUCID DREAMING
https://upload.wikimedia.org/wikipedia/commons/e/ef/Lucid_Dreaming.pdf
When attempting some of the techniques in this book, you may have some frightening experiences, such as falling sensations or sleep paralysis1 . Although the authors attest these are not dangerous, you should avoid techniques that create these sensations if you would prefer not to experience them. Your own expectations will have a significant effect on your dreams. If you believe that dream characters act dull and lifelessly, they are far more likely to do so. If you believe they can be creative, original, and surprising, they are far more likely to be. Remember that the easier you think it is to dream lucidly, the easier it will be. Many of the techniques and “facts” presented on these pages are not backed up by scientific research. This is not to say that these techniques do not work, only that they may be placebos2 or be ineffective much of the time.