The high-pitched whine of a dentist's drill must be one of the most horrifying sounds in the universe.

Like CJ said up there, I had a root canal today. It wasn't so bad, except for the knowledge that the dentist was drilling into my freaking tooth. *shudders* I spent the entire time quoting "Celestial Navigation" to myself. And running "Carry On" through my head. Though I blame the latter for the dentist office's Pandora channel--it was playing just before I was called in.