Yeah, I have heard about these three dreams lots of time from a number of different people: falling (without hitting the ground), running (without getting ahead), and turning on the light (without visible results). I'm sure many smart heads have come up with interpretations to them, and some of them may even have a consensus about them. But since it's all subjective, I rather make my own guesses.
And lucid dreaming? I probably should get back to it, hehehehe!
Merry X-mas to you too!