A miniature ballista maker huh? The things you learn about people here.
The whole idea of chopsticks is so you don't "shovel" your food. The purpose is to savor the taste and texture of the tasty morsel on the end of the chopsticks.
Another point of etiquette: you shouldn't hold your chopsticks too close to the food end. The further you can hold your chopsticks away from the picking up end the more "cultured and refined" you would appear to be.
And the Mr Miyagi trick, although a highly commendable skill, is definitely a "no-no".