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How much of what you state is your opinion, as your whiplash comment seems quite off from a quick google search. Getting hit from behind would cause this occurance more often from hits from behind, not from the front if this is correct.
Avoiding contact to the face sure seems like a stretch as well, how many facial injuries happen due to a body check?
And by jumping, I agree it changes the point of contact, which makes it more dangerous as you have no control on how you land or how your body reacts/contorts after contact.