The end fight scene from The Prodigal Son.
I read Jackie Chans autobiography this year. He attended the same Hong Kong Chinese Opera school at the same time as Yuen Biao (white headband in this scene) and Sammo Hung. One of the funnier anecdotes amidst the recounting of general beatings and cruelty of the Opera School. Was that the young Yuen Biao was so tired once in a gymnastic training session. That he fell asleep balancing on his head.