that's a hard one to remember...first time i think was the time i found myself running down a corridor, and no matter how hard i tried, the corridor kept getting longer, meaning i never got to the end.
Somehow, in the dream, i pulled myself up short and said, 'don't be silly, corridors don't get longer, you are dreaming. Calm down!' and after that, i was able to run to the end of the corridor!
I didn't know what it was at the time...it was soon after that i began keeping a DJ...