Alright, you shouldn't do anything you don't want to, I suggest you try not to go deeper than level 3. Also here's a great thread full of things to do in a LD: http://www.dreamviews.com/f11/1000-t...-dream-104556/

Inception is a great movie, it's taken stuff from lucid dreaming and twisted them a bit. Like "totems" which are basicly RC's. I recommend you see it Also there's been alot of talk about the layers they enter, which sounds a bit like the levels you're talking about. The last one is called "limbo" and apparently if you get stuck there you'll be lost forever. But this is all just fiction ofcourse.