a) After determining that todays ill feeling was mild migraine or pre-migraine related, I failed to find the correct balance in trying to medicate it away. Not huge pain, but definite lack of accomplishing any of the day's plans.
b) I was the target of a drive-by souping. Well, not quite -- they did stop the car, get out, and ring my doorbell before presenting me with soup. And homemade bread. Mmmmm, vegetarian vichyssoise. Apparently I was swaying/wobbling a bit at the time. See (a) above.
c) Ah, an explanation of why caffeine is useful to the plants that produce it! "[...] a bitter alkaloid that probably forms part of the coffee plant's defense system--caffeine also works as an antifungal, a selective phytotoxin, and a limited insectival chemosterilant." (Scott Rothstein, chapter seven of The Coffee FAQ)
d) Doggone it, I know I had a fourth thing I was going to mention, but it's gone clear out of my head.