sleep paralysis and astral projection are totally different things. astral projection usually happens when awake. it used to happen to me daily when i was little its the way your mind shuts off randomly. i remember just walking down the hall and it happening.. or when im about to open a door as soon as i touch the knob ZOOM!!!! im wizzing past planets and solar systems and through gaseous clouds. it doesnt happen to me anymore which is good cause its a little too fun. you fly so freely that you dont want to go back in your body. and when you do you end up feeling disgusting.. heavy.. stuck.