The other day I noticed that on the back of the one dollar bill, there
is a phrase:
The Great Seal of the United States
It is split into two circles.
When you fold the dollar so that the two half circles meet exactly, a
new phrase is revealed
As Cory Doctorow so succinctly described it,
"Historical proto-Al Jaffee hides trenchant commentary in design of US Dollar Bill"