Had a root canal with no local anasthesia. I lost one of my fronts in a bar fight and in spite of several shots, my dentist could not deaden the nerve. I was numb from the waist up it seemed, except for where it counted. He gave me several shots, then started drilling. I pride myself on having a high pain tolerance, but that was unreal. He shrugged it off as damaged blood vessels not carrying the goods to the nerve due to trauma. Looking back, the man must have been a quack or a sadist. I would rather be captured by an Apache war party than to go through that again.