This has happened to me twice to date. My favorite RC is the one where you pinch your nose closed and try to breathe. What happens is that in a dream I use this rc, but I doubt that it worked because its hard to breathe with my nose covered. I became lucid by trying another rc after that one. When I woke up, though, I had a stuffy nose.

I think that having my nose clogged while I was sleeping may have caused the faulty nose rc's. This has lead me to wonder about the extent of the effects of physical conditions one may have at the moment of dreaming with the dream itself. Anyone know anything about this?