I am frequently amazed at how things I thought people had stopped believing will, at the oddest moments, pop back up. I haven't even gotten out much recently because I've been sick, again. Anyway...
When I was a kid studying various martial arts I heard repeatedly, from ostensibly good sources, that if your life was in danger you could kill a person with a single strike delivered to the nose with the palm at an upward angle. It seems everyone knew this. Except, it's not true. Sheer, utter balderdash. I'm pretty confident of this because it's been done to me, twice. The first time I'm sure the guy had no intention of killing me, he was just trying to win the fight. The second instance I'm less sure about. In both cases my nose shattered like antique china and I subsequently pounded my assailant into the ground. It is pretty disabling. Your nose, usually broken at that point, starts to run with both blood and mucus, your eyes tear up and want to close, and your vision gets blurry. It CAN be a fight stopper, but for someone, like me, who has been exposed to something like OC a few times, it'll only slow them down marginally.
As you can see, there is no bone in the nose to 'shove into a person's brain.'
There is a bony bit between the eyes, but if you're hitting that, it's likely your opponent isn't moving, so you shouldn't be hitting him anyway.
There are other ways to kill with bare hands if and when necessary, but I'm a little hesitant to post them.
Next myth is mostly funny.
"If I keep my pistol in a fanny pack, no one will know I have one." Hah! That hasn't fooled anyone in years! Okay, caveat, women can sometimes get away with it, when dressed for running for example. Men cannot. Wifey and I were at a Subaru dealership a few days ago and a guy had a fanny pack on and not only did the wifey and I know he was armed, everyone in the dealership did. I even heard one of the salesmen ask him if he was a cop or a permit holder. Guy got a little embarrassed. Turned out he was a cop.
So stop it guys, you're not fooling anyone!