Re: High kicking
Any strike to the noggin with a blunt instrument, arriving at the peak of acceleration, is gonna leave a mark. I just question whether the foot is the best of those blunt instruments with which to deliver that strike, when there are equally effective ways that are easier and leave one less vulnerable to countering.
And I note this after a quarter of a century of karate and TKD study. Again, high kicks (for anything but sport competition) are for the exceptional, but not the average or typical practitioner.