My husband ran track, hurdles, and was state champion in pole vault and regional champion in high jump. He also played varsity football and wrestled. He received a full scholarship for both track and gymnastics and he chose gymnastics. Funny, but he thought gymnastics was the most challenging sport. He went on to become an All-American in college gymnastics.
Sorry to highjack the thread. I don't know why I thought it would accomplish something by arguing with the life experiences of a 13 year old. If Talk is Cheap says gymnastics isn't a real sport then who am I to argue with that logic?
Anyway, back to the OP. We've always had a trampoline and no accidents with our 5 kids. I don't think they are for the casual backyard owner though. Our kids have been hurt on our horses but we've always had them also. We do draw the line at ATVs and motorcycles. 4wheelers, go-carts, and motorcycles scare me but others feel comfortable owning them.