You are awesome man. I like the mystery handle you are using, "Anonymous" it's the bomb. As for my thoeries on what Chi is pretty much what you've said. My grandfather like your master has told me not to talk about it openly with people since I was a child because he didn't want people to know about it. It's like a family secret, we practice in a specail away to build/attain Chi, that's all I can say. It's what we call our vital/internal energy, one can attain it through proper breathing and other techniques. Many of these methods of attaining Chi are well hidden since ancient times. My grandfather knows atleast 3 other families who study one form of attaining Chi or another and they only teach within their families for many generations. Can I shoot fireballs, like you I can't do that nor can I walk on water. One day, I'll master my vital energy. I haven't seen any 80ft jumps, but I've seen intense stuff. Two finger handstands, Giant slabs of rock broken over heads, dude from china went to a martial arts tournament and let random people from the audience hit him as hard as they could and the hits didn't move him. He got hit by this Giant Pro boxer dude too. Right in the gut. That was like the hardest punch I've ever seen. Dudes ran over by cars, needles stuck into the outside of the eyes while being attached to a rope holding buckets of water, then the guy stands up and swings them around. Smoke from this 85 year old dudes fingertips. Etcetera, etcetera. Bruce Lee was into Chi, he used to do fingerjabs through full cans of coke(Coca Cola). Dan Inosanto says he saw bruce do all sorts of weird things that he never really talked about. Dan says fighters couldn't even touch Bruce lee, let alone hit him. According to legend, when martial arts were at it's highest peak in ancient China, it is said many were capable of flight through Chi. Today people are doing it through wires! LOL!