I saw this on a thread on FZIOA and I thought I'd introduce it here.
The purpose is to make a wish, but have the next poster grant it, but corrupt it (eg. poster1: I whish my feet had jet engines in them, poster2: granted, but you can't turn them off). He in turn can make a new wish.
I'll start:
I wish my FZ1 would never go down, no matter what.