Kudos to you, Video_Junkie for not jumping to conclusions and assuming you are being abducted by aliens or molested by evil spirits. I'm glad your research brought you to DreamViews instead of... say... to this site:
http://naturalplane.blogspot.com/200...ow-people.html
I hope that link doesn't give everyone the wrong idea, and start a shadow people riot :lol: My point is only that this experience is very common, safe, and normal. No reason at all to be afraid. Like you've already said, this is normal hypnagogia / sleep paralysis. Troughout history, this has been seen as everything from demonic posession, to alien abduction, to ghost hauntings, ect. Do an internet search on "Old Hag" or "Succubus" to see what I mean. The experience is filtered through our world view to give life to our mythology.
What you are experiencing is the sometimes rocky transition from wakefulness into a dream state. As real as it seems, you are actually just dreaming you are floating around your room. That is not your real room, only your mind's reconstruction of it. The natural reaction is fear, because this is such an unfamiliar state to be in. I've always assumed the terrifying hallucinations are generated by the fear, not the other way around.
I get this all the time. I get the textbook Sleep Paralysis, with all the associated hallucinations. I sense presences, see shadowy figures, hear loud sounds, feel vibrations and body distortions. This is what led me to lucid dreaming in the first place. I can induce it at will, and it is no longer frightening. The trick is to relax through it, as you did when you floated up out of your bed. If you sense a presence with you, ask it for help, embrace it, or expect kindness from it. Dreams work on expectations, so try and keep your expectations positive and inquisitive. With a little patience, you can turn it into an amazing experience.
Here is one good example from my dream journal:
http://www.dreamviews.com/community/...653#post951653
As you get more comfortable with the odd feeling, it will be less frightening and more FUN! Just imagine, you can experience your wildest dreams with that same vividness and realness you felt in your brief floating. When people recount their lucid dreams, they are not just rambling off some brief imaginary daydream. They are recounting something that felt as real as real life. Sometimes more vivid than real life.
People are always trying to prove Out of Body Experiences are 'real' by attempting experiments like the one you suggested. As cool as it would be, none of the experiments have ever worked. It seems like it would be the easiest thing in the world to prove, but sadly, so far it is impossible. Obviously I'm still holding out a little hope, because it would be one of the greatest discoveries in human history.