U.S. Dollar Bill Origami
The first time this was published on the Internet was on May 9, 2002 at Allbrevard.com. According to the backstory, five days prior, one of the webmasters discovered that folding a new (September 1998 redesign) $20 bill in a certain way would reveal pictures eerily similar to the World Trade Center and Pentagon ablaze, while at a NASCAR party.
A New Orleans artist, Dan Tague, though not a subscriber to this sort of conspiracy theory, has taken to folding U.S. currency in very intricate patterns to spell out messages from the letters on dollar bills. He is skilled enough at this that he was able to fold various bills to read, i.a., “holy shit,” “reality sucks,” and “we need a revolution.”
Here are the instructions on how to fold similar one.