Saw the acrobats on TV doing the springboard trick. So we put a thick plank over a rock, chose my buddy Mike as the propellent heavyweight and skinny me as the projectile. Everything went great, except I did't have a plan after I went four feet in the air and came down on my wrist. I hobbled around with it in a bandana sling for several days when either my parents or the school decided that was enough, whereupon I went off with my mother to Dr. Wosniak, an orthopedist with his shoes covered with plaster from doing casts. He took my wrist between his thumb and fingers and popped it into place, a second or two of serious pain, then wrapped it in nice warm plaster for some weeks. That was the end of my career as an acrobat, and also the end of my violin lessons and student orchestra career, which was the up-side so far as I was concerned. I did many crazy things as a young person, but that is the most coherent and understandable to re-tell. The scariest part was having the cast sawed off, although the scary saw was really not an injury threat, it looked pretty dangerous.