This is a hilarious sign on a crosswalk button:
(http://www.nytimes.com/images/blogs/freakonomics/posts/Runforit.jpg)
Source: http://freakonomics.blogs.nytimes.com/2008/08/27/freak-shots-blame-it-on-the-moon/
Darwin at Work!
rofl
Ha! I like that. Such a simple statement in just the right location = comedy gold! :D