When I had my wisdom teeth taken out, I was awake but gassed up on nitrous oxide.
When he actually pulled the teeth out there was a loud cracking sound and I broke out giggling and couldn't stop. The dentist found that highly amusing. "Oh, you think that's funny, do you?," he said.
My cousin just said the same thing happened to her. Not me. Completely, 100% knocked out. I remember showing up at 7AM, falling right asleep, and waking up around 10:30 and being completely disoriented and high. Fell asleep, missed a job interview (not that I could talk, but still. Did get the job though.) Doctor prescribed some kinda off medicine (can't remember now, but it sure as hell wasn't Ibuprofen.)