Fist of legend

Let's see a lame "special effect" of impaling a human with a broad sword.

Let's see how the clothes miraculously crawled  down on the body to cover it  during the jump.

Now let's look at Jet Li's doubles. If you look closely enough then you can notice that in many of his films he did a little of the fighting scenes himself and most of the work was carried out by his doubles.