![Every computer, at the unreachable memory address 0x-1, stores a secret. I found it, and it is that all humans ar-- SEGMENTATION FAULT.](http://imgs.xkcd.com/comics/pointers.png)
If you hold your mouse over the image you will see the rest of the joke.
My wife finds no humor in the strip yet I often fall on the floor when reading them. If you get a chance check them out some are a lot more funny then this one.
Just remember one thing. If you put them on your site please don't forget the title text!!!