You make a wish and the next person grants it, but with a twist. Then that person makes their wish.
EXAMPLE : Your wish - I wish I had pizza for dinner
Response- Granted, but it gives you food poisoning
I wish I could fall asleep
Response- Granted , but you get killed by Freddy Kruger
and so on and so on I hope this makes sense

So I will start .......... I wish I had a flying car