My 9 year-old had his first competition yesterday (along with myself and my 12 year-old daughter). My son is double-jointed and has freakishly flexible joints. Watch him here as his opponent (eventually) submits him with an Americana (at what point does it become a Kimura? lol) It was like this all day. He rolled against several opponents, and all of them were frustrated by their inability to submit him with otherwise technically perfect armbars. My son lacks experience, but once he gets his technique down better, he's going to be a tough one to beat! YouTube - Chase's double-jointed arms Edit to add: just for clarification, I absolutely do not condone this at all, and have been lecturing for months about tapping. (see my follow-up post, below). Sorry if I gave that impression. I've actually sternly lectured him and even yelled at him a few times for not tapping when he should have. Sorry that I didn't convey that in my original post, but trust me when I say that you shouldn't confuse my amusement at some of the footage I shot yesterday with a lack of concern or bad parenting. You guys who criticized my (apparent) attitude were absolutely correct in doing so... but I should have clarified. Yes, I'm amused at this video... but NO, I wasn't amused at the time, nor have I indicated to him in any way that I find it acceptable.