ah FreeinChrist you were just a second faster than me.haha..i agree fully with what you said.
To bring it further, whether in the body or out of the body, Paul had undoubtedly had a vision and so during this vision, there is complate absence of sense to your earthly surroundings. It's just like dreams, we can feel and sense that we are "there" in the body. I believe this is what Paul meant and thus he said he wasn't sure. Only God knows what happened to him.