snapping my arm in half

Back in the day when i was just a little boy something very bad happened to me. I snapped my arm in half, it hurt really bad. How it happened is i was playing with my neighbor outside and we were playing a game were he would through the toy dragonfly and and whoever got to it first got the through it the next time, and so what happened is he through the dragon fly and i ran as fast as i could go and jumped on it then he still thought he could get it so he jumped on me and thats how he snapped my arm in half.