Mr. Check was forged in the oldest volcano in the known world; carved from the Great Potato by Zeus himself. This man is a legend and the stuff of Gods. Sass will get you his respect, but if you go too far, he will destroy you with the wrath of a thousand suns. Learn from the wisdom of an ancient; bask in the light of his glorious knowledge.
He may mumble and have some very strange jokes, but he's a great biology teacher. It's easy to get on his bad side, so be nice and show respect!!