..after we had crossed a footbridge over the Saugatuck River. 

Cecilia: Dad, do all rivers flow south?

Me: I doubt all of them do, but almost all the big ones do. But I know of one big one that flows north. 

Cecilia: Oh, right, the Nile. (where the heck did she get that? smart kid....)

Me: Yes, that one, but that's not the one I was thinking of.

Cecilia: In the US?

Me: Yes, in fact you've been on it when we go to FL.

Cecilia: That one in Jacksonville? St something?

Me: Yes, the St John's. 

Cecilila: Why does the St Johns flow north? (I kid you not, in those exact words)

Me, in the woods, at the top of my lungs: BECAUSE GEORGIA SUCKS! HAHAHAHA!

Cecilia, chuckling slightly: That's a football thing, I take it.