Why does Sifu Ronny Singer raises his leg high in this pattern "Swallow Flies through Clouds"?

Do you know how these patterns are used in combat: "Green Dragon Plays with Water", "Traveling Dragon Rolls Clouds", "Dragonfly Dots Water", and "Reverse Hanging of Purple Bell"? They are as beautiful to watch as they are combat effective.

Before the course, most of the course participants had no idea of their combat functions. But towards the end of the course, they come out with very sophisticated applications. This training also enables them to understand combat applications of patterns they see for the first time.