Hey Jody I was just using this as I was sleeping and was in a deep sleep state after being up all night. I was perfectly fine and even having higher awareness of my dreams, which were normal for once! I was conscious of the sounds emitted from my headphones which was fine until I heard the most awful sound in my ears, like a screeching/skipping/nails on a chalkboard BLASTED through the headphones and my heart started to skip faster and fell out of rhythm and my body seized up and I caught no breath. The dream I was having visually came apart at the seems like someone ripping paper into shreds also. All in a moment. 

I played it back to try and see why there would be such a sound? Idk if I am tripping or I just can't find the sound but it absolutely petrified me, right up under sleep paralysis levels of fear. Why would that sound be in there? 

Or is my mind playing tricks on me? (I have always had a hard time sleeping and have very frequent nightmares/terrors) my heart is only just now returning to normal and I am left wondering if this is for me.

Edit: I should add that I believe I was in one full cycle as I slept for a half hour and the time was 8am and now it is 9:07 as I type this. I also am experiencing an ache in the front of my head, like the frontal lobe of brain. I really wanted this to work for me. Idk if I can try it again unless I know what purpose that sound served.
Hey, Holly!

There are definitely no screaming sounds anywhere in this track. If it wasn't a malfunction of your headphones I'd say it was a hallucination.

The line between awake, REM sleep and stage 1 sleep comes with all kinds of hallucinations. Most people see images, but hearing random sounds isn't all that uncommon.

That all being said, 8 AM is super-late, and unless you work the night shift and have repatterned your circadian rhythm, your brain is going to prefer the lighter REM state at that time of day. At the most, I would suggest using the beginner sleep track then letting your brain do whatever it needs to after that: https://youtu.be/jUpr0aSYu6A
Holly J