Riann J. posing with Damian Villa, the 2010 US Open Gold Medalist, after his training seminar held at Knockout Martial Arts training headquarter in Rancho Cucamonga on May 8th 2010. about 20 students attended the 3 hour special training seminar, the event was very informative and the kids were able to get very important tips on how to gain advantage in a tournament, specially with how to use the Lajust electronic scoring system.