What is the nicest thing you have ever seen?
What's the nicest thing you've seen someone do?
What is the nicest thing you've ever done? What is the nicest thing you ever did for someone? What's the nicest thing you have ever done for anyone? What's one of the nicest thing you have done for a stranger? What's the nicest thing you've ever been told? What is the rudest thing you have ever seen someone do? What is the nicest thing you, personally, have ever done for another person? What is the nicest thing that has happened to you for being nice? Something thing you've seen? What's the most beautiful thing you've done? What is the most beautiful thing you've seen? What is the kindest thing you have ever done for a stranger? What is the kindest thing someone has dones? What is the cutest thing you've ever seen in your life? What's the kindest thing you've ever done for anyone? What is the best thing you have ever seen? What is the best thing you have seen someone do for their spouse? What is the coolest thing a stranger has ever done for you? What was the kindest thing you have ever done to someone? What was the rudest thing you've ever seen? What is the most nicest thing you have done to a prostitute? What is the most beautiful thing you have done? What is the most beautiful thing that you have ever seen? What is the most amazing thing you have ever seen? What's the most impressive thing you've done? What is the most amazing thing that you have ever seen? What is the most interesting/amazing thing that you almost witnessed? What is the nicest, sweetest, or cutest thing you've ever seen a child do? What is the most beautiful thing you have ever seen? What is the weirdest thing you have seen someone do?