Moebius
Yellow Belt
One of my senseis is a very experienced godan, and he tells me that he was never shown many of the 'hidden' applications in the katas until he took seminars with Master Harril (http://en.wikipedia.org/wiki/Sherman_Harrill) that he had his eyes opened, so he now tries to pass that along to students who appear ready, able, and desirous of learning more advanced techniques that are in the katas.
I was fortunate enough to attend a seminar by Sensei Harrill. He was a great man and a wealth of knowledge. I had the same experience as your instructor. Sensei Harrill definitely opened my eyes to new possibilities.