I have never had a lucid dream, and last night I was trying really hard. In one dream, I suddenly consentrated very hard on "waking up", becoming aware in the dream. Then, I heard a loud, high tone in my ears and woke up. I was sleep-paralised, but, after a few minutes, swallowed (I read somewhere it sanps you out of it) and could mave. As soon as I could move the tone stopped.

Any ideas what the tone was? Was I still half in a dream, or is my subconscience trying to tell me to lay off trying so hard? Any ideas are apreciated