Curtis, even by the standards of the day, was undersized for a linebacker, but he could pack a mean punch. Just ask the wise guy who thought it would be fun to run out onto the field :-)
There was a great picture of him somewhere, ripping the head off of a quarterback (can’t remember who that was, maybe Roman Gabriel)
That picture made quite an impression on me, but today it would definitely be a penalty. Heck, maybe it was back then.