Killing with a punch to the "nose bones"?

Boxers wear gloves to protect their hands, not to protect their victims. If you threw 12 rounds’ worth of punches with unprotected fists you’d fracture several fingers at a minimum.

Open hand (eg Tai Chi) head slaps are supposed to be quite effective at delivering concussive forces without injuring the hand.

Kiai!!

heh. made ya blink!

That’s how I always heard it. Heel of the palm driven up and towards the person’s nose, following the angle it has from nose tip to skull.