Behind the scenes?

Hi, my first time posting on a forum- so please tell me if I posted wrong place etc :)
So last night I had my first proper lucid dream, though it only lasted a minute or two.

Anyway, as I realised I was dreaming I suddenly felt this weird sensation, and then starting hearing a noise like literally the noise of my thoughts- it was a high pitched sort of sound you might hear from PC circuitry, then all of a sudden it would stop (instantly) for a second or two then start again.

The best way I can describe it is that it seemed as though my dream was like a movie being played on a reel at a cinema, and I was sitting in the room behind the projector.

Anyone else had any experience like this?

That sounds like Hypnogogia, have a search on this site and you can find TONS of info on it!