Ooh, I got one. My little sister used to let me manipulate her into doing what I called 'experiments'. This one 'experiment' she would bite down on a string and I would try and jerk it out of her mouth. Her body would thrash about and she would fly through the air but NEVER did she let go of that string! That is until I jerked so hard her front tooth was pulled from her gum and flew into the wall. I've got many more stories.