There is Donnie Yen movie called "Dragon". I think most of the people watched this. At this movie, Donnie Yen used a breathing technique when he is carrying bamboo walking at the mountain. This breathing technique is something concerned with martial art. I think it is really smart and very useful not only for martial artist but also for people who don't know martial art. Can you tell me the name of this breathing technique or can you share some ideas? Thank you.