I love xkcd and make sure that I do a pit-stop by that site, in case I need to refuel the lighter side of my day. The unix version of their site http://uni.xkcd.com/ totally cracked me up.
Some of the routinely used commands produce funny results
You are in a maze of twisty passages, all alike.
You are Richard Stallman.
Oh, I’m sure you can figure it out.
You should really use emacs.
You should really use vim.