I got four teeth out a couple weeks ago. They were all in the same area. Two of them broke during extraction, and there was some drilling. There wasn't much pain until the following week when the gums started to heal. But even that wasn't too bad.
The night following the extraction, I finished the Tommyknockes.
The only time I've had Nitrous was when I was in school, and had to get 20 something stitches in my ear.