You do need to be asleep for astral projection, although the person who heard you was asleep. Or it might have been a crude case of telepathier. Im doing what research i can on this subject although i am working alot at the moment so its during what spare time i have.
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you do thats probably why it was much weaker then an actual astral projection... you were still conscious or interacting with the physical world so it didn't have as great an influence... almost like you where trying to talk to somebody through a closed door way instead of actually opening the door to talk to them