i don't believe in them. most experiences are just your mind playting tricks on you. alot of the experiences, believe it or not, have alot to do with sinus problems. if you have ever woke up at night because of sinuses, you know exactly what i'm talking about. some things happen differently for different people but mine make objects around me get bigger and smaller, kind of like the room closes in and goes away. mine also enhance the sound around me so that a pen dropping may be a boom in my mind.