You don't even have to go that far back. ESPN used to have the Jacked Up segment, but quietly stopped doing it after all the negative press around CTE/concussions in the late 00s. Here (in Nnamdi Asomugha's hit) we hear a commentator talking about a player in the fencing response saying, "You see the arms up, you know that he got... JACKED UP!" Leading with the helmet like this would be an obvious personal foul today. I love a big hit as much as the next guy, but when I see someone go into the fencing response, it really bums me out.