I'm not 100% sure, but I think what you're talking about is HI, and yes, you can DEILD from this, and it is a DEILD. Stay still as much as you can of course when this happens, and just watch the HI passively without much thought. You may feel tingly or strange sensations in your body as well. Eventually (~30 seconds) the dream will become more and more vivid and you'll forget about your real body and enter it with ease.