I had all 4 pulled in the same session without going under. They gave me 10 shots of zylocaine, which consisted of 2 in each gum area plus 2 sticks in the roof of my mouth (the most painfull part of the process and it wasn't that bad). The weird part about being awake is the feeling of the teeth being ripped out of your mouth yet there is no pain. For one tooth that was particularly problematic the dentist actually had his knee in my chest trying to get leverage and a good grip on it. After it was over they stuffed my mouth full of cotton gauze and sent me back to class (was in Air Force tech school at the time). After I began spitting up blood in class the instructor let me leave and go back to the dorm. I slept for 14 hours, woke up, and everything was good. I was slamming shots at the bar that night.
The joys of being in the military. Good times.
I had a similar experience. I got shot full of anaesthetic (novocaine I think) and after 15 minutes still had some feeling, so they shot me up with some more. There was a bunch of pressure with the second set of shots that was uncomfortable and was easily the worst part of the experience.
The odd part is even though you can't "feel" what they are doing, you can still tell exactly what is happening.
Having the doc's knee on my chest while he wrenched my tooth free, shooting it across the room was pretty neat.
I spent a few nights bleeding and drooling all over my pillow, but was okay within a few days.
To contrast, I got put under by an anaesthesiologist for a colonoscopy recently. It was very much a matter of "okay, we are going to begin, you should feel sleepy pretty soo..." and then you wake up in the recovery room.
If you want to know what happens to you (which I think is kind of cool), or if $400 is a lot of money right now, then do it awake.