QUOTE(DRleungjan @ Jun 26 2006, 02:11 PM)

What I believe the movies try to portray when they have monks flying and floating and whatnot, is what in the martial art circles is refered to as 'light skills'. Having this attribute is one of the very by-products of diligent hei gung (qigong) training.
DRleungjan

I believe the flying and floating are just myths. I believe qing gong is just a way for the person to move like they could fly or float. They still need to follow the physical laws.
My father had learned qing gong in his youth. He told me that one of the training method was to fill a big Chinese water jar with water. These water jars are usually very big with thick walls. An adult can fall in and drown in it. Then, the person in training will walk around the rim of the water jar to practice his balance. As time goes on, the master will take the water out of the water jar one bucket by one bucket. Eventually, the student needs to be able to walk around the rim of the water jar without tipping it over or fall off himself.
Another method was also recorded by many martial artist around late Qing and early republic era (around early 20th cenury). The student will tie on iron sheets around his feet. Then, he would stand in a hole on the ground and try to jump out of it without bending his knees. According to some people, this training would benefit by practicing nei gong (inner gong fu).
I am not sure nei gong is the same as qigong. Some people in recent years made it out like it is the same, but I have my doubt. According to some people, practicing nei gong could make your body become light and easier to control, so you could manage more difficult physical movements. You could also have more strength than your outward appearance. According to a famous author in Taiwan who was a Qing nobility, he said that he had seen, in his youth, an old lady who was very short and very skinny, but others told him that she was one of the famous martial artist in the Northern China at the time. In my impression, qigong practician were always very muscular. I may be wrong, or they mix the term qigong and neigong nowadays.
My father had learned a form of nei gong, but his master died when he was 12 or so. When his master was dying (in his 90's), the master could not control his qi and it was going everywhere in his body, so the master died very painfully. After my father saw it, he decided he would not continue the same path, so he gave it up. I heard there were many different school of nei gong. The best kinds would not have this problem, but the masters of those schools do not easily accept students. My father and I believed that the nei gong he learned is close to the so-call qi gong of today, so I also stayed away from qi gong.
About climbing the walls, I have read some accounts about that. A few martial artist said that they did need to do two things to climb that wall. They needed to run toward the wall from a little distance away and jump. Then, they needed to use the unevenness of the wall as a stepping point to get them on top or over the wall. I also saw on TV an interview of a famous Hong Kong martial art movie star Tan Dao Liang. He was the direct descendent of the martial art family, Tan legs. He showed on TV the famous Tan Legs' method of climbing walls. He had two walls fairly close together, and he used splitting legs method and climbed straight up for at least 5 feet. I thought he could keep going, but that was about close to the top of the walls they set up. Later, he came to U.S. and set up a chain of martial art schools.
With the ability to balance well and climb walls and jump, the people who learned Chinese qing gong could walk all over other people's roof top with no problems.