First person makes a wish. next person grants that wish but corrupts it.
Be as imaginative and mean as you can be.
example:
Person 1: I wish I had a Ferrari.
Person 2: You have a Ferrari. Made by Matchbox.
example:
Person 1: I wish I had lots of money.
Person 2: You have tons of money, all stolen from the federal reserve and now you're on the FBI's Most Wanted list.
or
You have lots of money. Made by Monopoly.
example:
Person 1: I wish I had a boyfriend.
Person 2: You have a boyfriend. His name is Bubba, he has three teeth, and his arms hang down past his knees.
Example:
Person 1: I wish I lived on a tropical island.
Person 2: You do live on a tropical island, and here comes the third hurricane of the season. Batten down!
to make this work, after you corrupt the wish, you have to make a wish of your own.
I'll go first:
I wish I was on vacation.