What is the funniest thing you have ever heard?
What is the funniest thing/story you've ever heard?
What's the funniest thing you've heard yourself saying? What is the funniest thing anyone has ever said to you? What is the funniest thing you have ever seen someone do? What are some of the funniest books you've ever read? What is the funniest thing you've ever heard a kid say? What is the funniest thing you've ever heard a child say? What is the funniest movie you've ever seen? What is the funniest book that you have read ever? What is the funniest movie that you've ever watched? What is the funniest book you have ever read? What's the funniest movie you have ever seen? What are some of the funniest movies you've ever seen? What are the funniest books that you have read? What's the funniest book? What is the funniest movie you have ever watched? What's the funniest thing that you have ever done to someone? What's the funniest thing you have ever done to someone? What's the funniest fiction book you've ever read? What is the funniest thing you have ever done or seen someone to do? What's the funniest movie ever made? What is the funniest thing you ever said to your family? What was the funniest novel which you've read? What is the funniest, most entertaining book you've read? What is the funniest thing you have ever done high? What is the funniest parody you have ever heard? What is the funniest name you have ever heard? What is the funniest experience you had today? What is the funniest thing your child ever did? What are some of the funniest movies? What's the funniest conversation you've overheard in public?