I do get all kinds of HH. And I know that one you talking about. I liken it to as if someone turned lights on behind translucent, semi-transparant glass. I also get an intense sound in my head when this happens and I'm just few seconds away from a LD at this point.

You may get used to it, but you are right, it does get me excited.

Next time when it goes away, try to pry open yur eyes with your dream hands, or stand up or roll out. You may be in a LD already.