Taken from another forum.. this one has potential for a lot of fun
Here's how it works.
You grant the wish of the person above you but grant it in such a way that it is more trouble then it's worth and you make your own wish.
Example
Person 1: I want a new gaming computer
Person 2: Wish granted, but it's the demented lovechild of HAL and SKYNET.
I wish I was genius
Person 3: Wish granted, but the knowledge drives you insane
Try to keep it funny
I wish for a P-61 Black Widow in AH2