What was the craziest thing you have done?
What is the craziest thing you have ever done in your lifetime?
What is the craziest thing someone has ever done? What was the craziest thing you have done lately? What is the most craziest thing that you have ever done for your loved ones? What are the craziest things you have ever done on your trips? What's the craziest thing you've ever done on vacation? What is the craziest thing you ever did on Quora? What is the craziest thing you've done in your school/college life? What is the craziest thing you have done on Quora? What's the craziest thing you have ever done on Minecraft? What is the craziest thing you have ever done for love? What is the craziest thing you've done in school? What is the craziest thing you have ever done with a stranger? What is the craziest thing you have ever done in a lift? What's the craziest thing you have ever done to express your feelings? What is the craziest thing you have ever done with your friends? What is the craziest question anyone has ever asked you? What is the craziest thing you have done in college? What is the craziest thing that has ever happened to you at work? What was the craziest dream that you've ever had? What is the craziest dream you've ever got? What has been the scariest/creepiest/weirdest/craziest experience you've had at your job? What is the craziest thing you have ever done inside a lift? What is the craziest thing you've done in your college? What is the craziest thing you have ever done to get someone?  What is the most interesting thing you have ever done? What is the craziest thing that you ever did in your life with your best friend? What is the craziest thing your partner have done for you? What is the craziest or scariest dream you've ever got? What are the craziest questions ever asked to you? Who is the craziest person to have ever lived?