Maybe he just couldn't get over someone using an exclamation point in a paper. From Strunk & White: "Exclamations. Do not attempt to emphasize simple statement

Maybe he just couldn't get over someone using an exclamation point in a paper. From Strunk & White: "Exclamations. Do not attempt to emphasize simple statements by using a mark of exclamation. The exclamation mark is to be reserved for use after true exclamations or commands."