yea a few times actually. I once had this experience where I couldn't move my body but my mind was awake and I could think to myself that I can't move i want to get up now but why won't my body respond to my minds command. I then saw my self asleep and i went to my brother and mother to try and wake them up to wake me up, but nobody could help me.

They say its projecting your brain power to a whole new level but it can be very dangerous. Im not so sure about the spiritual theory they have about it though.