What a fun little waste of time. Grabbed from 3bruces.com:
The object is to propel a mound of fecal matter with your ping-pong paddle so that it connects with the rotary air circulation device. Once you get some practice, try spring one off the stapler or landing one in the coffee cup. Even better yet, go for a “Mac attack” and ricochette one off the iMac screen into the blades. They did a fairly good job of creating a sound effects for the moment when the caca hits the old ventilador too – so how can you lose?