1st poster: I wish for a unicycle.
2nd poster: Wish granted. But it doesn't come with the wheel.
I wish I could go to a circus again!
3rd poster: Wish granted. But, a horde of clowns eating torches will surround you to get their big elephants to stomp on your face.
I wish I didn't wanna go to that circus.
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And it goes on for as long as this topic dies. I'll start us off.
I wish I won the lottery.