I have had experiences like you describe too, ethereal. It feel totally different than what I believe Ecstasy is talking about. You are right about it being disorienting. I always described it as feeling like the rug had been pulled out from under me. But, it is more of a mental feeling than a physical feeling. It feels like my energy feild has expanded to to encompass the whole universe, not like I'm floating around inside my aura.
Clear as mud?