Someone submits a strange or interesting photo, and everyone makes up captions for it. Submit another photo when we've exhausted the current one, but try to wait until there are about 10 or more captions for the current one.
Here's how to post an image. Type this:
<img src="http://cybernetnews.com/wp-content/uploads/2007/08/funny-20mouse.jpg">
You get this: