The only time I went in for a root canal, the dentist began drilling and decided halfway that the tooth couldn't be saved. I was sent home with a new appointment for the extraction. Unfortunately for me, the dentist had drilled deeper than he thought and had buzzed a nerve in my tooth. When the novacaine wore off, I was in the worst agony of my life. Way worse than breaking my wrist or my ankle, just unbelievable pain. I went to the emergency room and they gave me a shot of demerol--that was the most dramatic swing of feelings I've ever had, from horrific pain to not being able to feel my ass in the seat in seconds.
I should have sued.