I caught the Dha session (had to take me nephew camping with his scout troop, so missed the sat/sun bits).
All I can say is WOW!. For a guy in his 70's, Dr. Gyi moves like you wouldn't believe....hell, I'll be honest, I've never seen anyone move that good. He went over some basics on cuts, blocks and thrusts, and then showed how they could be put together into realistic patterns. Even sitting on the sidelines and watching I picked up some good tips.
If ya didn't see it, ya missed a great session. Have heard the Sat one was just as good.