But is the amount of G's a car achieves by sudden braking the same amount of G's at which your brain accelerates/decelerates in your head? Wouldn't the amount of G's to the brain depend more on how the body reacts to the jolt - than the jolt itself? How can we be sure the whipping of the head isn't enough to cause injury in this situation?

Looking for clarity on this as the same thing happened to me yesterday. I am 8 months PCS.

Thanks!