I think the idea of flying kung fu masters came from wuxia novels and folk tales. Which in turn, took place from a conversation like this taking place in Ming Dynasty China.
A: "Kung fu is cool!"
B: "Yes!"
A: "People who do kung fu are totally sweet!"
B: 'You are correct!"
A: "What can we top that with, in terms of sheer Coolness?"
B: "What if they flew?"
A: "OMG! Dude, that would be the best thing EVER! And they would have these swords that are like, really really flexible, but still somehow able to hold an edge and cut through metal."
B: "And there would be these movies where they're fighting all the time, and using kung fu, but you never see them training to be awesome assasins."
A: "What are 'movies?'"
B: "Why are we speaking English?"
"Prepare your mind..." "For a mind explosion!"
-The Human Giant, Illusionators