I called my wonderful dentist, who said she could fit me in today at 2:00, but sadly today is the Teaching Day From Hell, when I teach from 8:00 a.m. until 8:30 p.m., so no go on that unless I wanted to cancel classes, and since I've had to cancel classes once already this semester I was reluctant to do that.
Me: "Well, the tooth is hurting. But not that badly. Do you have any time tomorrow? Or Thursday?"
(These are my non-teaching days, the days I use for writing. Or, you know, going to the dentist.)
The dentist's assistant: "We can fit you in Thursday afternoon. Are you sure it's not hurting?"
Me: "Not very much."
The minute I hang up?
You guessed it. Tooth starts banging away like a jackhammer.
Oh, well. I can always call back.
(Original XKCD here.)