this is funnier http://www.youtube.com/watch?v=oS3Olh9DnaE
I know a dentist in North Hollywood, CA who actually perform this kind of operation and its as if you never felt anything and yes, I was also confused when I realized that the whole treatment is already done with just like 15-20 mins. I remember my experience. They are really good at it.
Gotta love that short term memory loss.
Her reaction is really comical. I remember when my cousin visited an emergency dentist Perth for her wisdom tooth removal because his reaction was the same.