In some biography of FDR that I read once, I remember learning that one of Roosevelt's parlor tricks was to have a guest draw a straight line anywhere through a map of the United States, and he'd then name every county along the line, as well as the party leaders and other political VIPs in the county. Impressive.
Compared to that, I suppose that drawing a map of the United States freehand isn't that big a deal. Still, it's impressive in its own way. Maybe we should make all our U.S. senators perform patriotic tricks like this. Via James Joyner.