If something like this is already up, please lock this.
Okay, so this is how it works:
You make a wish, and the next poster grants it, but ruins it. As an example:
Poster 1: I wish I could fly
Poster 2: Wish granted, but you get sucked into a hurricane then die. I wish I had a pet tiger.
Poster 3: Wish granted, but it bites your head off.
Etc. Etc. Etc.
So, here's my wish. I wish I had some ice-cream.