OK, this is really embarrassing, but here goes. I was watching a wisdom tooth extraction for the first time this past week, and it was a fascinating and wonderful experience. I saw the blood, saw the tooth ease out of the socket, and marvelled at its having come out in one piece. It was only after the extraction procedure was done that my mind realized what it had been watching and a wave of light-headedness came over me. It was as though all of the blood that normally resides in my head had suddenly swooped down to dwell somewhere around my stomach. It even felt like there was this huge pressure differential in my ears. There was a little nausea, but I was more afraid of falling over than of vomiting. Of course, trying to act normally, I hazily excused myself from the office for a bit of fresh air and got back to normal within 5 minutes easily. Now, I know that this has to be 100% mental because it didn't come over me until I started thinking about what I'd seen; during the extraction itself, I was enthralled, and everything felt perfectly normal. Have any of you guys ever done mental exercises to successfully master light-headedness, or is it something you find goes away after a few extractions/surgeries, or is it a lost cause if the symptoms appear at all?