Does the U.S. government need some help with its debt problem?
The government of Zimbabwe gave up printing money in 2009 when hyperinflation reached the range of 10-100 million percent per year, shortly after this bill was printed. Problems were already occurring with computer programs in automatic teller machines unable to handle numbers this large. Let this be a warning to all governments which solve problems by just printing (or borrowing) more money!
More information can be found in the Wikipedia article on the Zimbabwean dollar.