Well, the kick to the chest I took in taekwondo a couple of weeks ago turned out to have broken my sternum; I gave it a while to see if it was just a bruise, but when it kept hurting I went and got it x-rayed.
So I'm banned from athletics for 4-6 weeks. Which means that the marathon and the ultra-marathon in November are going to be run after a not-very-good lapse in training. I plan on completing them at the slowest possible speed, then writing a book on how to run a marathon without doing anything but playing D&D and eating doughnuts for 6 weeks ahead of time.
In the interest of journalistic honesty, I will go kill and eat a doughnut in the near future.