I have a spirally ring scar on my stomach from a few years ago. I was on a (badly placed) trampoline, right next to a decorative iron-pole fence. Being the klutz that I am, guess what I did? I mis-jumped and fell at an angle onto one of the swirly poles. Lucky for me, I'm thin, and it missed vitals. Fun story though, whenever anyone sees it. Sara-ka-bob. That's me. Haven't been on a trampoline since.