METRO FOR RED-STATERS
One of the gazillion associations in the DC area has written a painfully retentive guide to the metro. "After one trip, you'll be a pro!" the breathless copy reads. Especially helpful -- the detailed instructions for purchasing a farecard, and I quote: "1. Put your money in the slot."
The only thing they forgot to add was not to get scared when the train goes under the Potomac, since it doesn't get wet. (I once worked at a newspaper where the publisher didn't quite grasp the concept of a subway, but that's another story for another day.) All I know, if I was thinking about coming to DC from the distant hinterlands, the level of complexity this suggests would have me out on the shoulder of 395, hitchhiking.
(Shout-out to DCSOB for pointing this one out.)