I would call it injury with a happy ending!
I don't really have any of my own aside from a co upon broken toes and many self inflicted cuts, but my twin brother broke his femur when we were 4. He was playing with dad in the hall and had a twin size blanket in tow. He went to turn the corner and the blanket took his foot right out from under him. He had a cast from the foot of the leg that he broke, all the way up to his waist and down half of his other thigh. My mom still has the front half of it stowed away with other memories from our childhood.