I don't know if a pyramid system can be funny... Maybe if it has jokes or something attached to it. Speaking of jokes, I got one:

There was this man at a restaurant and he had ordered a salad. When it arrived and he began to eat, he found a button in it. Thus he called the waiter: "Sir, there is a button in my salad." And the waiter replied: "Don't worry, its all part of the dressing!" :)