Have you ever heard the following:
"You need to know you form backwards and forwards."
It literally means that you need to know your form inside out....be able to do it in your sleep, blindfolded, etc., right?
Our sister school came up to our class last Saturday for one of their student's black belt test. During the candidate's test, their instructor invited one of his blue belts onto the floor to demonstrate something different than what any of us has ever seen.
She did one of her forms backwards.
Now can you say that you know your form backwards and forwards?