...and I'm sure that this isn't what Headhunter means...but you should DEFINITELY care about concussions, we all should. But, you can't science/research your way to anything. It's just not how this works. You can get knocked out from the silliest, most mundane thing and conversely people take savage beatings over 12 rounds and never leave their feet. Protect your head. Don't fool with your brain. Training is supposed to keep you safe. If you put in the time, you'll develop a sense of when you are safe and when you are not and it won't have anything do to with metrics or vectors or P.S.I..