What do you do when it's a slow news day on the Friday before a three-day weekend? We at HuffPost Money decided to investigate the contents of our wallets and YouTube.

While we spend our days uncovering hidden fees and bogus bank charges, we were shocked to discover that some of the most clandestine facts about money were right there before our eyes.

That's right, if the many conspiracy theorists of YouTube are correct (as, sarcasm here, they typically are) your paper money is a labyrinth of encrypted codes and symbols.

Here's our list of the craziest hidden messages that bill-fanatics have found on U.S. currency. (Let us know if we've missed any by e-mailing money@huffingtonpost.com)

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  • Osama On The Twenty

    HuffPost editors were browsing for photos the other day when we stumbled upon this Getty image of a $20 bill folded up in a way that makes the bill read: Osama.

  • Occupy The Dollar

    We tip our hat to <a href="http://terrymaui.com/Dollar.html" target="_hplink">Terry Maui</a> who showed us that if a $1 bill is folded twice, the phrase "The Great Seal Of The United States" can become "The Greed States." It's like the U.S. Mint could sense the coming of the Occupy Wall Street Movement coming decades ago.

  • September 11 Imagery

  • Man Claims He Found Bill With Bush Watermark

  • Masonic Imagery