Have you ever just been like trying to sleep then get a deep sinking feeling?

yes i have had it many times...if you sleep on your back whe you're really exhausted...then sometimes really trippy stuff will happen

 

i just recently found out what that is. it usually happens when you are exceptionally tired. it's your brain making your muscles all become extremely relaxed all at the same time to prepare for a very long and deep sleep. there is a jolting or falling feeling because every muscle in your body all get the same message at the same time, which doesn't happen often.