I have a question that I have been wanting to ask someone ever since I was a kid and I have NO idea what causes it but it happened to me for the first time in a long time just the other night. Perhaps it has something to do with GAD although I did'nt see it on the symptom list. Here goes...

I usually have the TV, AC and fan going all night. About 4 nights ago, the power went off and it got really dark and quiet and hot in my bedroom so I woke up. As I lay there, it was so deathly quiet that I could hear (very clearly) what sounded like heavy machinery running in my head. That's about the only way I can describe it.

I used to get this years ago too but I never got it that often. Has anyone else ever experienced this, what is it and what causes it?.

- GreyGoose