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I think it had a lot more to do with the 6 dozen or so solid uppercuts that Lopez landed on Ortiz's jaw.
The difference is that Tito actually did have the power to ruin guys. A bad beating can cause you to be more concussion-prone.
What's the worst about it is not knowing. More people should see a doctor to get their jaw lining checked annually.
I get my jaw lining checked three or four times each year and I'm not even a professional prizefighter.
The best youtube comment is this. "Mayweather used the ancient jaw breaking punch of ancient China. Takes a few months for the punch to take effect."
Every loser with an ability to upload video to youtube believes they need to be heard, regardless of the shit that spews from their heads!