After I saw the movie "Waking Life" a few years ago, there were a couple times that I tried the trick of looking at printed text in a book or newspaper and saw it didn't make sense and realized I was in a dream. I don't think I had much control after that and if I remember right, I just woke up. But I never tried any of the other tricks (I think they are called RC's here). One is dimming lights. I can see how my brain might not be able to produce something as complicated as a page of printed text, but why wouldn't it be able to do dimming lights? I've heard of people doing some outregeous things in there dreams so it seems strange that dimming lights is not an option.