Mom, why do people run marathons?
I don't know, it's good exercise, and some people like to run.
But they have to run so fast and so far.
Yeah, that's true. But, you know, some people enjoy that kind of thing.
Yeah. Crazy people.
(Edited to add: I was going through and labeling some old blog entries and found this conversation I had with Cal from around this time last year. Hee.)