What was the fruit of the tree of the knowledge of good and evil?

I don't know if this came directly from God or from me. I am always asking him questions. and He has answered them many times. Most, if not all of us have wondered what the fruit of the tree of the knowledge of good and evil could have possibly been.  Adam's apple isn't called Adam's apple for nothing. I believe that when Adam bit into the Apple and it began it's descent down his throat, his eyes came open and he realized the stark implications of what he had done. The painful reality caused the apple to become lodged in his throat. This created the Adam's apple.  Many of us have believed it to be the apple, but this helps to add validity to the reason why we have for so long. Just something to think about on today.