I discovered the best typo ever while filling out an "Economic Impact of the Arts in Minnesota" survey a few months ago. They were asking for some line-by-line information of the income and expenses from the most recent tax returns of freelanceers in Minnesota -- It made the experience a little more interesting:
So there you have it. Careful proofreading, a rhyming typo, taxes, and all this on an economic impact survey for a respectable arts nonprofit. What a recipe for fun!