Again, this has nothing to do with the teacher's ability to explain the form application. If the form creator did not create a meaningful form, there isn't much that any teacher can do.
At 0.37 of the following form, he moved his right hand to his right and then suddenly throw his right palm to his left. Even today, I still cannot find a meaningful application for that. Some people may say it's a training for the eyes. Others may say it's a dart throwing.
http://www.youtube.com/watch?v=f48lAjfJLek (at 0.37)
What do you think it should be?