compactrationale:

It is just like a kick to the face from Ran-neechan can knock you out, but if she does not control her force, it could kill you. Any form of self defense has the potential to kill, and that is why one must use it with responsibility.

“That may be true for most people you use those things on, and I have noticed it’s a dial on your shoe, so you can adjust the power, I’m guessing…”

“…Does that mean you’ve just wanted to kill me in particular?”

“Because you can not argue that I would have been able to walk away from something that brought down a freaking marble column (and apparently had enough force that the wind from the impact blew out the candle a good three feet away. I’d just get off with broken ribs if I was lucky. Heck, even that guy felt enough of the force behind it to move his hand out of the way, more than likely in the fear it might get broken. Or his shoulder dislocated. And that would have been a glancing hit.”