Consequently, there are some very strict "rules" about things like plot lines and character development.... Strength, honor and courage, for example. Other things like "reality" aren't so important. It all goes to the principle of "Suspension of Disbelief". For example, when you see Robin Hood shoot an arrow and it splits the bullseye, right down the shaft of another arrow you say to yourself, "Allright!!!". You don't stop to think that this is a physical impossibility.

It's all about cultural differences. This movie is a "crossover" from the Asian culture. When Asian people go see a movie like this, they have the same attitudes toward it that you would have when you go see a "Robin Hood" movie. They WANT to see characters doing superhuman stunts, even if they KNOW that stuff like that could never happen in real life.

I get what you were trying to say though .
 

Usually, the arrow will go about half way down the shaft and then split out the side of the one already in the target. It will go flying off in a random direction. If you follow the rules of archery competitions you'll know that in order for a shot to count, the arrow has to embed itself into the target. Thus, if one arrow splits the shaft of another, it doesn't count unless it goes completely down into the target or flies off in another direction and hits the target.

(Being brought up in Pennsylvania, I have spent a lot of time shooting "projectiles" at things. )