I have mentioned xkcd.com before. Here’s a recent cartoon that I’ve gotten from them via RSS feed. It made me laugh. Like most of their comics. This cartoon sounds like something I’d try. :-)
Visit http://xkcd.com/ to see more of their comics or use the RSS link above to subscribe that way.

Oh, and note their warning on the website:

Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).