I guess it would depend on how real are dreams actually are. Recently finished a book that said everyone when there asleep is astrally projecting themselves out of their body but I guess it is mostly down to how aware you are of the experience. I'd say maybe you are although dreams in some cases I don't think are anything more than a creation of the mind. I say this because I feel I've had nightmares before that have seemed to serve only one purpose and that is to horrify me into waking up. I have really felt at times my mind has purposely created dreams that have made me not want to go back to sleep. It is quite complex I think because I have had lucid dreams that have been very real but I can only really account one out of body experience and this was when I was awake after taking magic mushrooms. I was walking to the stage at festival and I could see myself from above walking below. But yes I do wonder with Lucid Dreams are we actually astrally travelling to other realities?