You’re right. I’m giving some explanation in this thread:
[url]My first amazing try]
And in this thread, there are 3 links towards hypnagogic sounds topics:
[url]not relaxing while falling asleep?]
It didn’t happen to everybody though. I would like to have such funny stuff, but I just had it once. 
I was repeating a sentence during WILD when I heard it like it was said by a girl in my room.